Malicious PDF — malware analysis report

Static analysis result for SHA-256 e103ecf7cd03fdb0…

MALICIOUS

PDF

73.6 KB Created: 2021-04-25 09:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 505ba4e28b5386bd9235c3d994480c69 SHA-1: a8b60164a75495afd00ff529c17b53d2f29378a8 SHA-256: e103ecf7cd03fdb0f42a04f8b4be3f6aa4a1bfa72a57155e67e0c752972a0529
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO spam and phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links suggest an attempt to redirect users to potentially harmful websites.

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://bologen.ru/strik?utm_term=troy+bilt+power+washer+2700+psi+parts PDF link annotation
    • https://cdn.sqhk.co/daxonotetil/iaTihjh/duwevef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_603bbaac2c4f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_60288e87cac14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_60207a4ee3c4a.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/d7q699P/troll_adventures_level_23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_5fd1324add7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_6030304ef11df.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/9giigjg/world_war_ii_pacific_battle_site.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_601ff884bd6ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_606c90aeaa237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_603a1343efa6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_ffe09181d3c9456cb6bd7ff36f24d0ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/gafizamewufesukugorifaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/atikmdag._sys_free.pdfIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_7a5b6ad9abe842f0a53ef0e8194a9007.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_486ebf43324248eba70acddb8aa61e4c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinezedu/xateladewofosema.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_a51cb9dbacdf464da32cc125b8cacd86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mufukep/45423533854.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/hilti_hit_200_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/watanodi.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_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 5544 bytes
SHA-256: fcf82a200ad21aaceeb6708045344ded8e9c8ca6de37d461d1f06e6304dd7ee7
font_01_sfnt_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 10128 bytes
SHA-256: f2039d3b5ae7ccb27c46fa0e5982e2cc086018feac29b087aa838a4a152b81b2

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