Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1d1bd6c986459a…

MALICIOUS

PDF

90.6 KB Created: 2021-06-09 01:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f8765dea325fb48f38a522183d3b195f SHA-1: 8d7beb11707522d542dba8f9d3167b422ca2a222 SHA-256: 8e1d1bd6c986459a23660043f24ca55f827ba31a3e24212e92be3324b35fa26f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. The numerous embedded URLs pointing to compromised websites and disposable hosting further support its malicious intent, likely serving as a lure or part of a link farm to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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) or Microsoft license-boilerplate 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://wastran.ru/uplcv?utm_term=voyager+5200+instructions PDF link annotation
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/c6161661ab81b281f4d484acbcce9918/91287055348.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/41877361895.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859d48329fc---83065309970.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/1de37ecbaef9251bb3eea1bdd3b2d905/95817286226.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a284e206dd1---80521989001.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/c2ojrrvb9fkdkhia1oiiq6k0n6/73444228690.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6d32c3b36---10654292570.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/966b96e326e6b6a4a1cb56fe50b07f6c/44536657578.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/31275282202.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/36bc29aba62b874149e04866e6f655e2/mupapomodejoz.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78fd996e92---28547663938.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/miduvumorizodok.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/stdqifcpllnk3ct9r9r7qj0dl0/xeludevezuvimeleferof.pdfIn PDF document text
    • http://bakoca.hu/files/file/66937117301.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/76tiv37svl6ggf0hnv5qjnb98m/feponixijajuvivojatovubal.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/naumudojvvi4j5k5d08ql5ck1e/69999453477.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe9b232216---gifenusivusem.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/028db6850dfaed6c77cfdfbf22b72970/69904839705.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b1b57759---11639799663.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 5400 bytes
SHA-256: 5fc54b9e710d4ebca676926d591d478804b481e3bbe83f5cfaca2305ba10a7d7
font_01_sfnt_off00012583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12583 18336 bytes
SHA-256: ab5d3c81b5d5140949b043b7fcaad527edd424f3a61bbd47628f3de4239ce48d

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