Malicious PDF — malware analysis report

Static analysis result for SHA-256 67956c2b75f93b0d…

MALICIOUS

PDF

81.4 KB Created: 2021-03-30 23:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 759b1458ae2866b6ebfdecab30af4507 SHA-1: 5b768d7443e2fe2c883c7d961ebd9a50a7a42416 SHA-256: 67956c2b75f93b0dab060652f575871181375a23ff44304ca3e8a2c745e86fde
186 Risk Score

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 0.9990

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/award?keyword=introduce+myself+in+interview+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_602f6ddec9b2f.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/cDia7ib/libovaboda.pdfIn PDF document text
    • http://parrrtner.xyz/sunbeam_heated_blanket_cord_2_prongmciks.pdfIn PDF document text
    • http://vittorguxx.site/82858150036nnzy1.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/X2iaghb/51832107228.pdfIn PDF document text
    • https://cdn.sqhk.co/lewenowaxer/eTcweGf/download_stickman_fight_battle_shadow_warriors_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/n1tF1kr/bsc_part_1_chemistry_practical_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/hg5ngjj/coolmath_moto_x3m_spooky_land.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/sapewawonurejesutupd7dr.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/ibqLSjj/76934210873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_600477bf4db7f.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/IHOFgjc/39609674459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487916/normal_5fcc8d0e13a09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401732/normal_600909117a092.pdfIn PDF document text
    • http://clebohets.xyz/the_boy_in_the_striped_pajamas_netflix_2020m1c9x.pdfIn PDF document text
    • http://aydym.club/2504467500j1olw.pdfIn PDF document text
    • http://bigowet.xyz/rorum6g2to.pdfIn PDF document text
    • http://arthromedro.xyz/2001_chevy_silverado_1500_wiring_harness_diagramgrvas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_60262ea63118f.pdfIn PDF document text
    • https://cdn.sqhk.co/merisipugito/Ngfjahb/92785871545.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/jcmijgf/gunship_iii_pro_apk.pdfIn PDF document text
    • http://streamsweets.com/7618157891737ofm.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://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_cead85f2a4fc40c3a6a40074c0abc9b8.pdf?index=trueIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_99132f6dc3b445cf8a36561ed6f2e134.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 5164 bytes
SHA-256: 565aee59868281cb51a46d2d1c92818a92b80323f88e1b243aebaf89d89cc9fe
font_01_sfnt_off0000ff45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 12028 bytes
SHA-256: 7e93e2f29cfb48fdc8993f5c5c10816e0954c19c6178046d6be3ad5f6b150487
font_02_sfnt_off0001279e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34