Malicious PDF — malware analysis report

Static analysis result for SHA-256 81b1e14f01492c1e…

MALICIOUS

PDF

74.4 KB Created: 2021-06-12 06:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9f5f11ad2c77211c40bab6a04f52d575 SHA-1: aa4175f7d00f5c0f2a3e858641ebd9dd42bdb71a SHA-256: 81b1e14f01492c1e53476f8b9c79c1c43ce37d9ab952e1ab46415a5e24e6bf65
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, including one pointing to 'garglob.ru', suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security checks. No scripts were extracted, but the overall structure and URL findings point to a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/pbw?utm_term=musescore+let+it+go PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5ffbeb051e6e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421462/normal_60039823d84bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407576/normal_5fe0a92cce952.pdfIn PDF document text
    • https://tivofemexire.weebly.com/uploads/1/3/4/0/134012880/3472361.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/sefonal.pdfIn PDF document text
    • https://zatiwakap.weebly.com/uploads/1/3/1/8/131871625/f611486607ca8c9.pdfIn PDF document text
    • https://sukifife.weebly.com/uploads/1/3/4/3/134334287/0fb95b04f.pdfIn PDF document text
    • https://famopenagunabot.weebly.com/uploads/1/3/4/6/134688774/gumolukatevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5fdbff05eb6cb.pdfIn PDF document text
    • https://buwotudotep.weebly.com/uploads/1/3/1/6/131606539/851a17476b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojefizowoj.pbworks.com/w/file/fetch/144622074/screwsoft_rar_password_unlocker_mac.pdfIn PDF document text
    • http://fuzugimife.pbworks.com/f/o_re_piya_mp3_320kbps.pdfIn PDF document text
    • http://tejudafo.pbworks.com/f/microsoft_office_professional_plus_2010_product_key_64_bit_purchase.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144422949/stack_cup_drinking_game_rules.pdfIn PDF document text
    • http://zofurutatag.pbworks.com/w/file/fetch/145140909/vetetidaxuvupi.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/w/file/fetch/144918882/fapiradulutodasiponibaw.pdfIn PDF document text
    • http://fujiserefi.pbworks.com/f/beyond_the_miracle_worker.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144526902/mechanical_workshop_tools_list.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/86696691424.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/latebixozakim.pdfIn PDF document text
    • http://dipoziw.pbworks.com/w/file/fetch/144452211/how_to_play_siren_head_in_roblox.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/145170177/hacked_version_free_fire_download.pdfIn PDF document text
    • http://vananizi.pbworks.com/f/always_kabhi_kabhi_full_movie_free_download_720p.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144904818/61016959056.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_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 4760 bytes
SHA-256: 80d07e367274c97c511aaf79f52d588e7e01fbfd8c6bac9478a65c9c83970258
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 11268 bytes
SHA-256: 9a1f38bc0c66be8ccaf3c0045e92631a39a4aee9769f978f1dd5c17ceaa1eff5