Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e60deadb40a617…

MALICIOUS

PDF

84.0 KB Created: 2021-04-10 01:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 67508ae1ce5e283120994f5bdf70286d SHA-1: df02444b328a182d43247ba63aab5b2d4ffc8288 SHA-256: 05e60deadb40a61729d03a4ee02bd21756ef386b7b8d5287ba617d9e48280f7b
186 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=ridgid+13+inch+planer+review PDF link annotation
    • https://gaxuzuwe.weebly.com/uploads/1/3/1/8/131871814/5199413.pdfIn PDF document text
    • https://bexipame.weebly.com/uploads/1/3/0/7/130776855/masuz-porifevegozig-tufejolisedeva-lemolixonu.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/nhfG3ii/2860330461.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/2724217.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/4iaiehh/97743876657.pdfIn PDF document text
    • https://xagaxomopezegif.weebly.com/uploads/1/3/4/3/134355140/b51b72.pdfIn PDF document text
    • http://mizarofu.22web.org/infant_food_guide_canada.pdfIn PDF document text
    • https://lizameguxif.weebly.com/uploads/1/3/1/6/131606128/bdca4595ae.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/uzNzfgi/dubanaral.pdfIn PDF document text
    • https://doxabonejanowi.weebly.com/uploads/1/3/4/6/134669922/c696302112d4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/kmspico_windows_10_activator_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/1884842765.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/livro_administrao_pblica_municipal.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/toxodo.pdfIn PDF document text
    • http://mikesivu.rf.gd/cheat_engine_6._0_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/kuwebetalofokavupaviwewo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/83893940137.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5D 5532 bytes
SHA-256: 02aa51970b05605f86a723c6502d73c290282bc92bb206081a9c2c1a1b169363
font_01_sfnt_off00011241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11241 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 11864 bytes
SHA-256: aca175a443238ea8458b4bf46f812dae3f2c97e105d49d56976d7b61bdf6588b

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