Malicious PDF — malware analysis report

Static analysis result for SHA-256 513e0cb0484d2410…

MALICIOUS

PDF

72.6 KB Created: 2021-05-08 22:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 13265b912ce931d5ec0b3fb2949fa2d6 SHA-1: b54dce63b596fcd5b0f8e8f9456c9dbfbac10fcc SHA-256: 513e0cb0484d24104fb9787d25722a3da64b7b8ad0c864a345b90bbd0c919452
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to a redirector URL, suggesting a link farm or phishing operation. The embedded content, though obfuscated, appears to be related to product parts, likely a lure. The presence of external links and the overall structure indicate an attempt to redirect users to malicious sites.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/strik?utm_term=magic+chef+rv+gas+range+parts PDF link annotation
    • https://laxopewivizi.weebly.com/uploads/1/3/5/3/135394850/e7d8c7839.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/dajazasebigone-wedipaf-mowirotipev.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/xojafemori/fidoninuxezabezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9f105d-5bb1-424c-9ce0-8deb61bd4d4a/in_christ_alone_passion_lyrics_and_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac27c40d-c78e-44fc-93d8-10165d52c146/the_redemption_project_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/54211342780.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_6b8ef9f7e7cf4a4f9138ec2ebc591c7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7560a9-bb86-4e9b-90cf-9cfc2b2b1688/how_to_use_qualitative_methods_in_research.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_d651d016ff0a4f119488468f9af282f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9317f589-09b3-44d0-be99-221d41223250/jiwijaboxifaniduziwa.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/judepisokamujitexabunanuz.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/45302125355.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_9210d054b75a41adbb7f53715df9d267.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zulezov/xuxizivuwelofenanaleniva.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_c1cab5dcdd06425888d58de4f90af228.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e62686f-9bcc-4bc4-abdb-339c32f35788/97266418606.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 5308 bytes
SHA-256: e56538b87bd16ed2d579cf784f9a268f57882456d05ea6d4a56d69aa710a6ac2
font_01_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 10588 bytes
SHA-256: 7209b29756ae71b1942b30c0233639eb0a0d3a343b4fc4dd6d42619e741dd181