Malicious PDF — malware analysis report

Static analysis result for SHA-256 179ade24b0683417…

MALICIOUS

PDF

81.0 KB Created: 2021-03-01 13:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b0e64c93c9627b2e222cffd1d347c3f2 SHA-1: 6fdf50048c8513e53897c4bfe03fedd5dd30bd2d SHA-256: 179ade24b068341729dd143856baed2df691535b22bad500021d34ba62720bc3
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to phishing or malware distribution sites. The document body, though heavily obfuscated, appears to be a lure related to chainsaw maintenance, suggesting a phishing or scam attempt.

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://maypoin.ru/strik?utm_term=how+to+replace+mcculloch+chainsaw+primer+bulb PDF link annotation
    • http://taygerr.com/79560715230w96ro.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/xenoziwexowoberans1v8u.pdfIn PDF document text
    • http://eeuuurrrrr.space/begofakelowuzin472bj.pdfIn PDF document text
    • http://italywow.pro/6747426972829yy.pdfIn PDF document text
    • https://gebiralegesexi.weebly.com/uploads/1/3/0/8/130814020/kolana-gefuwow-koxojejikud-weveruzurib.pdfIn PDF document text
    • http://twitter-center.com/toro_ss_5000_deck_beltmwjj5.pdfIn PDF document text
    • http://gtmedis.com/pakofes5o7rd.pdfIn PDF document text
    • http://gtomishebs.xyz/wilegabamipama4znd1.pdfIn PDF document text
    • https://xapukaxefibaj.weebly.com/uploads/1/3/4/7/134772468/nedos-mozuwewosulaj.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/62199800445yoikj.pdfIn PDF document text
    • http://ccckkkkk.space/globe_load_promos_15_pesosgz1h8.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/gazivemon/kidemifotiwasemumoxunabez.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/56701484608.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/raja_bhaiya_video_song_free.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_off0000fc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC60 5368 bytes
SHA-256: 19e325cbc0af6284adcf4da8c58742baf1e0274379f6e57beeb12f16d0260dcd
font_01_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 11704 bytes
SHA-256: f26b4d5b6cdec92aab7406de0897acfb22c927779d1335d70ff259e849790ce6

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