Malicious PDF — malware analysis report

Static analysis result for SHA-256 627a9645e658c058…

MALICIOUS

PDF

179.4 KB Created: 2021-03-18 12:07:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: adce6a9809e0c8aaeb0ea324645d133b SHA-1: 440769be394945f26149b5623d26f909e57321ce SHA-256: 627a9645e658c0586a4d1aaadc4d56a393f11481ea766a8a8ac4749260782e58
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting or unknown reputation domains, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ponafet.ru/wix?keyword=tune+bot+manual+pdf PDF link annotation
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/dc5ca3c795074d.pdfIn PDF document text
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/2437e5714f5.pdfIn PDF document text
    • http://xitnet.fun/notuf9z7ld.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/9439853.pdfIn PDF document text
    • https://voxiranadazezud.weebly.com/uploads/1/3/5/3/135312978/bugamosivasi-loxepimoxokevu.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/xunalugurera_xugiw.pdfIn PDF document text
    • https://vusokozederik.weebly.com/uploads/1/3/4/9/134901716/taligadu.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/bigekimikifipemanobu.pdfIn PDF document text
    • http://uspeh.icu/vakat61tf4.pdfIn PDF document text
    • http://navaram.online/67381347733auf6q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://musizaxodolof.epizy.com/8th_grade_vocabulary_words.pdfIn PDF document text
    • http://gipomafusabakix.rf.gd/nasivojozikamo.pdfIn PDF document text
    • http://rukodulaban.epizy.com/holding_hands_hd_pic.pdfIn PDF document text
    • http://galelebuwef.rf.gd/tasupenigetalebog.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/sodium_alginate_properties.pdfIn PDF document text
    • http://suserol.epizy.com/differential_diagnosis_of_cellulitis.pdfIn PDF document text
    • http://jakosorer.epizy.com/how_long_will_big_buddy_heater_run_on_low.pdfIn PDF document text
    • http://novosumagib.epizy.com/nccn_guidelines_colon_cancer_screening.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_off000284e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x284E5 5000 bytes
SHA-256: 4562869c6d2ea948291e18c94cf283f35c1e4ef7bea80b7c354ed5827ffdec98
font_01_sfnt_off000295d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x295D1 12480 bytes
SHA-256: bb3f64580960d75221fa21926a12c32b27d342c1698e6da63a566d9893ae2260

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