Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef1f5ab106850c0…

MALICIOUS

PDF

79.0 KB Created: 2020-11-14 07:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b584574757b3c58d7a32a1b26349e433 SHA-1: d30ed3caef52bdaf6c912a5d4124b2566d58a663 SHA-256: 7ef1f5ab106850c02736dd0406247eff36882c307a69ab32abd4692932e070b7
214 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. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=paper+mache+advent+box+hobby+lobby In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5fa1cc537f69b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_5fac439478c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f89195f7a36a.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/xowuroxoxeleku_kojetonaro_jasejadekaduraf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502245/normal_5fac06a45d427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5fa31245c9f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449769/normal_5f9ff47d4cf82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f88721ee5d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5f91f4477b30b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/suximawo/72414838516.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/vogof.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/84951763720.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/83709232097.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/understanding_definition_of_limits.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F8 5244 bytes
SHA-256: 88e3b0b0ee0c95a8c3fe52c28a58107386fb69e20a0e45e730d50ebd5299d9d7
font_01_sfnt_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 10288 bytes
SHA-256: d47c7d9bc7e1eaf078bd5098d014f3d41120b8a571998e2385b6dc994652031a
font_02_sfnt_off00010b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B07 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b
font_03_sfnt_off00012093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12093 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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