Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafd082e566b45a6…

MALICIOUS

PDF

105.2 KB Created: 2021-04-05 16:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9c52903a6943c852eef89b268e9e8843 SHA-1: 51821dbefdec08e56612c080f995e4502713745c SHA-256: dafd082e566b45a640758228113b571840c6ff44ba5b510222d09c4483968eb8
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=casey+westfield+high+school+softball PDF link annotation
    • http://lngcliente.com/firuwefapatiuzgxk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426960/normal_5ff65a7c22406.pdfIn PDF document text
    • http://kernig.store/mafotilozadisogelimafekao7r0b.pdfIn PDF document text
    • https://cdn.sqhk.co/gajuwagi/YJpjjle/navajituwipuxilupifu.pdfIn PDF document text
    • https://cdn.sqhk.co/sugigevapure/iigcZii/the_yellow_wallpaper_critical_analysis.pdfIn PDF document text
    • http://construt.site/cv_format_for_job_in_bangladeshyaflm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5fda40ca82a1e.pdfIn PDF document text
    • http://vehicleinsusa.com/zatodajoak0g5.pdfIn PDF document text
    • http://datujizid.iblogger.org/71811421082.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kabisebax/46705777459.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/28265677010.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/guvawisunakufodap.pdfIn PDF document text
    • https://5e1449e8-5ae4-4a15-bc7a-ee23795bc964.filesusr.com/ugd/3a34a5_309a221cb25c4073b23d488e248ae136.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/56737192809.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/libros_sobre_budismo_gratis.pdfIn PDF document text
    • http://zumosupol.epizy.com/wodomuvabafobujikurijo.pdfIn PDF document text
    • https://71bfc0c6-4bef-405a-aee6-9e9dcaab3d12.filesusr.com/ugd/708cfd_a0337156721543fd894724e51d408d65.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_54116ad6cac64ded82d9ddeb58791116.pdf?index=trueIn PDF document text
    • http://jedafalakax.epizy.com/rigilamikasesabakilub.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://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_off00015a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A88 5428 bytes
SHA-256: 876a4eb3f636608f81853915c098166c1231a5a12e0ddf2ed5d3f339e941a98e
font_01_sfnt_off00016d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D14 11748 bytes
SHA-256: 158b693254068cf8e51905479c36a3146f35fbce192909e50357ab261a540045

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