Malicious PDF — malware analysis report

Static analysis result for SHA-256 333594083fcc919a…

MALICIOUS

PDF

72.8 KB Created: 2021-03-15 14:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3f36a7cc2aec01495e22899e1965b544 SHA-1: 120ef07f5a5b1fe7212154c2bf5f08e17a83ccd4 SHA-256: 333594083fcc919a727175e66094880442faf89825b7f1596c625e3e4a3a3356
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=essentials+of+computer+architecture+douglas+comer+pdf PDF link annotation
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/1430371.pdfIn PDF document text
    • http://8gusevshop.space/camouflage_skins_in_fortnitexe4bf.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/6308028.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/raxodirimunad.pdfIn PDF document text
    • https://vetebifarex.weebly.com/uploads/1/3/4/0/134016991/8fa64db623d420.pdfIn PDF document text
    • http://useplafond.xyz/tobugesu4z1n.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/blue_jackets_playoff_tv_schedule4mogi.pdfIn PDF document text
    • http://localdesign.me/kala_bhairava_ashtakam_songs_freebw10h.pdfIn PDF document text
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/vevuxizejobariji.pdfIn PDF document text
    • https://gepogujewo.weebly.com/uploads/1/3/1/3/131382217/kixosofezudekitofapu.pdfIn PDF document text
    • http://vkrowl.com/806689450zxlka.pdfIn PDF document text
    • https://solazipakiku.weebly.com/uploads/1/3/4/5/134509697/gagowopirumexufiler.pdfIn PDF document text
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/funesuju_bitumoke_lopoxi_jovotadubites.pdfIn PDF document text
    • http://romeoplanet.club/34354221936i2qrn.pdfIn PDF document text
    • http://wigogaduxatinuv.iblogger.org/toriburebujiwasipo.pdfIn PDF document text
    • http://freedate18.xyz/jipijidapordam2h.pdfIn PDF document text
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/8019844.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/44b6a786c9.pdfIn PDF document text
    • http://ccckkkkk.space/rorivufenixejovimozibome8litx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zozinidusekoz.epizy.com/ruwafimijavelanorilafapo.pdfIn PDF document text
    • http://malebujezasipip.rf.gd/mamifujegapireluvolod.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_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 5524 bytes
SHA-256: c18fee6370991b5c78b43c96f7ea03a6c3704145a1049788c10a6ced8c0a52d8
font_01_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 10372 bytes
SHA-256: a58b795d0e2d780136cc9a2d16c35f785443565b83a5f7b32ca0974276d1dd93

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