Malicious PDF — malware analysis report

Static analysis result for SHA-256 822af7d3151b9fd8…

MALICIOUS

PDF

92.1 KB Created: 2021-08-09 22:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 84db9ae15ba8024e655ee8579c48e3d8 SHA-1: e856360eb385d27ce59c9319ae56d6932b121d2d SHA-256: 822af7d3151b9fd8f615612ee3d3959be2d58b02505a91251cbeab207ff01e8b
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a payment redirection lure, aiming to trick users into altering payment details. The presence of numerous external links, many hosted on compromised or disposable domains, suggests an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/uplcv?utm_term=how+do+i+connect+my+jbl+wireless+headphones+to+my+iphone PDF link annotation
    • https://goacetours.com/ckfinder/userfiles/files/mivuvakerufidonoxam.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/723b6ae9f509caa4865cf9fd6898885f/laduwa.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/56049950156.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/11855732894.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/72212735412.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/86532974711.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/29400113632.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/27602366893.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/c721e7c6efb741c4dbb188d945506a28/kumotulekodumexis.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/zapadarijuzozenukexizadi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4fcf8e7eb---79549653785.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3ki6mf0a9qsnh01ntojj38jsi2/30321745989.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/8736505156.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/xiselajalalipazig.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/cf38102d5578354d916d4365f4ce78cb/jurofuvipobezod.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084212a12e7d---25078175011.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/20891317853.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098228af36a8---xoxujekajigan.pdfIn PDF document text
    • http://artospace.com/pics/file/rejezogipeladisivifezol.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7498003c2211915417a702d98f953fbd/42377428152.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/vopavido.pdfIn PDF document text
    • https://langumeistras.lt/i/File/kazobaro.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16075db266a3c6---dibutiduwaneximes.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4896689db3---29036725292.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/woxozamajimegazak.pdfIn PDF document text
    • 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_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 18084 bytes
SHA-256: 9b6301cd1e15780daa53d3cfe1cf188703ce3199df761e2f763e6ff8e0e63263
font_01_sfnt_off00013066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001487d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487D 11240 bytes
SHA-256: 3a6400fe54db551e6ec01553b7f39d8ba1abec335fdd748124206e7e14bfb294

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