Malicious PDF — malware analysis report

Static analysis result for SHA-256 031cbc2303279504…

MALICIOUS

PDF

79.0 KB Created: 2021-03-15 23:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3e5109a282216e86813f2a041a355de3 SHA-1: d59f5b2a36d88fda3a96c29739146b655fd3f88c SHA-256: 031cbc2303279504414cd292eb57f1a6011d7e7e720fd77d0eb882d9fe7bdb3a
184 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'strangers of the mist pdf'. The presence of multiple links on disposable hosting further supports a phishing or malicious redirection scheme.

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 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.
  • 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://yafferge.ru/wix?keyword=strangers+of+the+mist+pdf In PDF document text
    • http://zelafagilu.iblogger.org/are_electric_blankets_any_good.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/j74idPO/98440516144.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/eIjazpA/nefemajanafezefutugenerem.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/bibzg09/yeetus_the_fetus_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/aicMKE1/baliguxibuvoporede.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/uhjxjbm/league_of_war_mercenaries_wiki.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/moxodo.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/hihiNgd/33591025527.pdfIn PDF document text
    • http://gnfcns.info/tevedaxamopenenomemam4c832.pdfIn PDF document text
    • http://100p-f.ru/sopoxuzozazajimujojamo21n43.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/6ieLhiB/28575818568.pdfIn PDF document text
    • http://zumofujej.iblogger.org/information_technology_project_manager_skills.pdfIn PDF document text
    • https://revapukas.weebly.com/uploads/1/3/5/3/135323612/jaleridesuzoraz_tiripi_vejokifulez.pdfIn PDF document text
    • https://kigekasomek.weebly.com/uploads/1/3/4/5/134598498/839020.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/4283921.pdfIn PDF document text
    • http://jenirafona.22web.org/rokipotakulelenipoziz.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/kanazakexas-jakajotokake-puwipimisoruw-jeleritu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foluketomiro.rf.gd/41424497883.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vitizukawisimuwuje.pdfIn PDF document text
    • http://kewupuz.rf.gd/rivonenelug.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/6452834174.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/english_worksheet_land_grade_2.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 5524 bytes
SHA-256: df1a8efd882282cf9c02d73260e44298e2ca867a15a483b15443aca5074138f0
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 10668 bytes
SHA-256: 747e051a7859420b00c05578d828c916f50eaa7f8bfd9db82d2fbdeb5a81d923

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