Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb380610a58a5fb1…

MALICIOUS

PDF

82.0 KB Created: 2021-07-26 03:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7423015f08cf08d0fbf09238bdf6f3e8 SHA-1: 90dc9006d1a632fd248a3a548fedccf6a092ee2d SHA-256: bb380610a58a5fb1e23cdcfd19899eabba33b4e82ef5eddd753faa0cb8c11efb
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and presents lures for both a download button and payment redirection, suggesting a phishing or credential harvesting attempt. The embedded JavaScript and numerous external links to PDF files on potentially compromised or disposable hosting indicate an attempt to deliver a secondary payload or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/sofivo.pdf In PDF document text
    • https://jamisonfurnace.ca/userfiles/files/duzotababidotev.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160714dcc10abd---49712074389.pdfIn PDF document text
    • http://topstec.com/d/files/61472455236.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff2a9798a9---3966851011.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/57372518251.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/91318068550.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/acb0c0839f720121634117f3cb9c8704/56987465998.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/zupisexajivisipugifido.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/23289241104.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/13632751638.pdfIn PDF document text
    • http://adamshs-pdx.com/clients/d/d3/d3c120c733f7363e2cdaef2cff5f3687/File/vaxizululalejefilivuge.pdfIn PDF document text
    • http://195exim.com/datas/files/77382361718.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/kapoliderumibaga.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6d2c53c5fa7694ffb2eb14afbb838016/27242539305.pdfIn PDF document text
    • https://grandegroup.net/files/gafijajokokewigotadinew.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/98433722604.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/20624429150.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf97e37aab7---pexosiza.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/25243380737.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4c8e6367b---97857932422.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210610235753353.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/43634639054.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=city+skylines+mod+apk+androidPDF 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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 10788 bytes
SHA-256: 6e5c2f31d721ecd52250b5e00b63a9227bb0799b7756f6cc7438eee996730c70
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 19236 bytes
SHA-256: c4d15f592d2df740dbc35db668bc36f289007a276c68ab18f4e09ac370ac90c1
font_02_sfnt_off0001224f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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