Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd863ee07ee66cd…

MALICIOUS

PDF

75.4 KB Created: 2020-12-25 22:35:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b354aaec43c9a3ca1ad3bb910a539b2 SHA-1: 1230bc420e16381250f902c9e799ca3c80807360 SHA-256: 9dd863ee07ee66cd934bd470005066d72372c4bb237d30bde2c7b2cb7a9b06f6
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://traffking.ru/aws?utm_term=1-+99+construction+guide+osrs+2018 PDF link annotation
    • https://nikalakikezune.weebly.com/uploads/1/3/4/7/134753818/wodanutogigarel-jegomuguko-kemujilugixube.pdfIn PDF document text
    • https://cdn.sqhk.co/kilatelazobe/ShNdpNS/94077217410.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/vunizi/erased_2012_movie_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e67da82-abcc-4f06-8a33-224d4114de15/thing_explainer.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/20781384724.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/brocade_6505_hardware_reference_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7b9de5-7aad-44de-876a-5d1d29684002/81825385686.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/67006021743.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/bagpipe_sheet_music_scotland_the_brave.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/saaho_video_songs_free_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/tasijojowaboxur.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/gupivilefi.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/label_template_word_mac.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_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 5480 bytes
SHA-256: fc1eb7824a296c571cbe3470b37343ea98eb2dc5768d5f51ada425a3f79aaef7
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 10784 bytes
SHA-256: 32a02a92fe4e19d79ba4383a90fd044968212e0c97bd09376cfa223d1e942aa5

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