Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac60838e96177409…

MALICIOUS

PDF

89.3 KB Created: 2021-09-15 20:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 622f283765642427ea013eceb9c05e9e SHA-1: 5658892ae386bd3d8b12f5a48c7a6602f133961d SHA-256: ac60838e96177409e8db003525c65001e2459185e968b91dee2ee63d4ec5d9c5
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing or scam pretext. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134a647183dd---20811873527.pdf In PDF document text
    • http://veszpremkosar.hu/_user/file/dogaviwosiwemov.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/8427961478.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/vilarufejirajaw.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/zujaxabi.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/zififilokorovuvulipuz.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/94925831147.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/94226155622.pdfIn PDF document text
    • https://ptogel1.com/contents/files/junim.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413cfc7d486---74591013353.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161373b007d235---nekiditidedirekazaza.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/wokadisazumefa.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/komesew.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311313da75c---87046560667.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/34330329596.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/zuvimo.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/pibodugudubez.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/furogogabejumema.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/84345136951.pdfIn PDF document text
    • http://bresky.cz/res/file/71329861736.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/loviwazeba.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/furubataxebirarage.pdfIn PDF document text
    • http://eko-uklid.com/files/file/70940668932.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/44058559766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=physiology+of+sport+and+exercise+5th+edition+pdfPDF 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_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 18008 bytes
SHA-256: 0bfccec639c2c66fee7dc2b6045aaef8cf08038596153e733f63b178378010a4
font_01_sfnt_off000124ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC2 11248 bytes
SHA-256: 317bc44c84ee98b842b3951bd2c30c1a88f3fddfd15a469254d3ee94cd44d25e

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