Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b7bc49421a7020…

MALICIOUS

PDF

73.8 KB Created: 2020-11-16 20:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8d90b0ffbf743ce4a83df4c92bcf5ede SHA-1: 9c69e460f93e9be54ac6406acf21b6a014bb2e4c SHA-256: e2b7bc49421a7020c5fe44ab9081ce8e8614b5d8730e3b66c319fe18d2f3c7a0
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffine.ru/123?utm_term=mohave+high+school+address PDF link annotation
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/1706279.pdfIn PDF document text
    • https://faviretekomukuf.weebly.com/uploads/1/3/4/6/134606805/1945612.pdfIn PDF document text
    • https://xajapeni.weebly.com/uploads/1/3/4/3/134341300/gipelipiweruki_saxedajidu_pisatasavosemu.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/d5cfb8.pdfIn PDF document text
    • https://pirowefe.weebly.com/uploads/1/3/4/4/134444143/kelizaralutisex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea257e4-cfa0-4089-a23b-a3451fbd8aeb/99284900984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0774cd-eb59-405e-86f3-e133e5086b2b/download_american_football_champs_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e77a02e-d14d-4b5c-bea2-8aeb541a1694/93129049032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1d8434-a736-4039-a669-242f48d52762/xejobute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2770cb8-96f6-43f8-a553-2965cd521db2/proteus_7.7_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/amazing_games_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcd064e-2861-48f4-a7d5-f107f68a0af1/34168537463.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC13 5264 bytes
SHA-256: f1e84adadb1386a835b0dc9d3549d764389a008daa039964dde362d398d59031
font_01_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 11456 bytes
SHA-256: 8d937cc0e3e6a58111e3d0868d0fc90f097ec81a9ee24df20e95bfa2a2c7dc88
font_02_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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