Malicious PDF — malware analysis report

Static analysis result for SHA-256 60208ba7c5bc778a…

MALICIOUS

PDF

72.6 KB Created: 2021-10-03 21:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d0d861fa33bc577c37f99781a136713a SHA-1: 4992a81319e124ab88b6b1edb7e3cbea620df955 SHA-256: 60208ba7c5bc778adc2e96f20bfa170bb53c84db5d501782ca15738ca17777fc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or services. The ML classifier and ClamAV detection strongly support its malicious nature, likely exploiting PDF vulnerabilities to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=fried+lobster+tail PDF link annotation
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/0sen19im0tn1n0ee9pq9227bi3/delekunupomuwonarum.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/pai48s5gbbnntt6j947eugd387/xakozizatojimekavu.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/01/file/nidepeze.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/76820565260.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/92592702770.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/loxuwerunurobupuxikite.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/gonogifisa.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/60760925962.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159d9b75a416---67892785036.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/lotejozizipidili.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/45606046420.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/tedelufiwojinofanusevus.pdfIn PDF document text
    • http://c-amc.com/upload/files/7518412712.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/93355087559.pdfIn PDF document text
    • https://pustelnik-budownictwo.pl/ckfinder/userfiles/files/69497382749.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/juraxugifux.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/bazej.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/winonijimedal.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/sisikeguzuxemobanubufabow.pdfIn PDF document text
    • https://glozor.com/userfiles/file/25718174702.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/lujorerawemezexok.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/61295048032.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/89507652958.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/fepujipafimunop.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/49240321230.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_off0000b975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD187 17700 bytes
SHA-256: 09e2d0bf081225a5147a1d5cf3dc84573b48ed9707f0f9f5ee51e079a2cd11c1
font_02_sfnt_off0000fe21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 10252 bytes
SHA-256: c4d2046c83b722760f29a88ce4c02fd803c167f357e3b2c36dd21678cf6a95a0

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