Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8271d5dc61bd00…

MALICIOUS

PDF

109.9 KB Created: 2021-06-30 09:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7268935376fbb23314007fb486b15ebd SHA-1: 6c65d9aff717ecc08349200b602258057dc94b2d SHA-256: 7b8271d5dc61bd009b025d83c2ab8e2d072b6c9c7683dd49ef6a334a00cf447e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, with a high-confidence heuristic indicating a payment redirection lure. The PDF contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting an attempt to distribute further malicious content or phish for credentials. No scripts were extracted, but the overall structure and heuristics point to a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/af19f77f14aa81f6ba1865f75690d7c3/zitivape.pdf In PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b171e5cf4e9---liwufenavizarukizasone.pdfIn PDF document text
    • http://debden.org/userfiles/file/93138536340.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/v1mrssn17gj55t578op5202j46/pomewenejikagilem.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080042b73136---28436400101.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/6762860061.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160797baf672b7---batunitumibarefolive.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6aabeef0f---lesobi.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210607203451068949ta6uhx.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4497559bb4ef506f432142d09fe71244/16214278473.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f1e5dbf77---rozefasinitisewol.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9bd941d5dc97718e185ecd9ac6ce94b4/bofofokezosipavamizilekot.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/vazusegukenupi.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886c1706abf---96073691285.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/635979c7e3c6240c72bfb42d0cafcbde/31878848650.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/25febe3eee5ca5aca16144d77e9c21ed/jawabaloxu.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/basilitekawadebixuzuvuzak.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210609_D521F97C7688AE5C.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994ddf192a9---nojimudalinekex.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8e2d1a1fcccb1f56c77478cc2fe2abd6/45449122039.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084a2d141629---vezunazol.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/93560051115.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5d0767b2---sirazit.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/554125e7579fd6c9eec2285e39202b1a/vugolurisi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f70e830fc---patagi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ice+cube+lottery+ticketPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624B 18276 bytes
SHA-256: c1b6a150dc0d6e5b1de2cb20d09e20daa1538da635b2ee379932d776885365ca
font_02_sfnt_off000191f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191F5 10188 bytes
SHA-256: a44246b655002ea4fde390f447f6d0d811f92d814c41dcb5a88bacb71a312d1c

Open this report in the interactive analyzer, or submit your own file for analysis.