Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee255d2a8d60f704…

MALICIOUS

PDF

71.2 KB Created: 2021-03-11 14:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0231f58044b9b5890cb177361bca8238 SHA-1: 0a89743943f02a256bfa4ffa149590aec22c7e02 SHA-256: ee255d2a8d60f704146daf55b362aa386bca8a6430c1d6e9182544d54b0a9c6a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be related to 'Farmall super m parts for sale', which is likely a pretext to drive traffic to malicious URLs. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=farmall%20super%20m%20parts%20for%20sale PDF link annotation
    • https://rakulemuvi.weebly.com/uploads/1/3/4/5/134506415/337582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468819/normal_5fc828783cec3.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/zaxigerawag.pdfIn PDF document text
    • http://kupuzuzopojesu.22web.org/26568408416.pdfIn PDF document text
    • https://cdn.sqhk.co/saboretiki/djc43EK/bipiwekajirajisenolejaniv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_60115b59de995.pdfIn PDF document text
    • http://towajemikof.iblogger.org/zofizerojosobotibikab.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/15531535294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_60261fc6142ff.pdfIn PDF document text
    • https://fawimerena.weebly.com/uploads/1/3/4/6/134630635/e0a05ce0d5a68.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/d9icPhi/tower_defense_simulator_twitter.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/sadat.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/waponab-fowerav-gopikafapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_6035fb83204a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_d157425a3533437ab64a6ab37aaaa2be.pdf?index=trueIn PDF document text
    • http://gonegexunu.myartsonline.com/muzevutegudilusev.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_cdb6eed3e8d94b7b959c01158566be7d.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_28a3ba2d50344bf59a936323b67dc2b3.pdf?index=trueIn PDF document text
    • http://lofupiwosilabo.epizy.com/the_book_thief_teacher_guide.pdfIn PDF document text
    • http://zokivobadid.rf.gd/yannick_afroman_songs.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_off0000d7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D3 5000 bytes
SHA-256: 2487dafc8622ddfc3ee48ab62099150aa38faadffaea36fc1b6964281c9f1340
font_01_sfnt_off0000e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 11612 bytes
SHA-256: d15bbf8d8df0a7dade0320f65d17b2b2d6515afb0debeb3a070bb21295256c72

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