Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e9f7a17fc5cac6…

MALICIOUS

PDF

79.4 KB Created: 2021-03-27 14:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dddca49e974fb04bdfffeddf0ffb669d SHA-1: 299cddfb31e7c9b2502f5bf16ae7c31e82addfb1 SHA-256: b2e9f7a17fc5cac61aaf3bfc3f30f652c0290079fad08e01ae184e3f4b4c3f4f
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to SEO-optimized content farms, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly indicate malicious intent. The primary malicious URL identified is https://dugedepap.ru/strik?utm_term=how+much+training+to+be+a+navy+seal, which is likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=how+much+training+to+be+a+navy+seal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451545/normal_5fe4da310d2fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5feaeb4d179a9.pdfIn PDF document text
    • http://xujimutisep.iblogger.org/fuxan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_605c852312f26.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/tometubufimopim/dream_interpretation_dog_bite_hip.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/jitix.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/dell_command_update_uk.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_e54f471402b744eb9aaad364e97a1453.pdf?index=trueIn PDF document text
    • http://kejoluxukoso.rf.gd/20604637293.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_09763e50bb164459ab41ce726e741f85.pdf?index=trueIn PDF document text
    • http://ditufadupogeju.epizy.com/72940985929.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/positive_impact_of_globalization_on_culture.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/nakudotonixipi.pdfIn PDF document text
    • http://xufeguwopox.rf.gd/why_wont_my_fitbit_versa_connect_to_gps.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_16a7c6663edd4a8d859ce0b40db0170b.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_1e7a5b6e9ecf4124ad27076429d43119.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomupi/alta_performance_academia_contagem.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_0525206ebcbf4a22a0e9e2e6a7bdbc44.pdf?index=trueIn PDF document text
    • http://xepalufozakot.epizy.com/meri_akhiyon_ka_kajal_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/91180294217.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/halloweentown_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/celestial_navigation_plotting_sheet.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_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 5568 bytes
SHA-256: 191b2b5bfeaa0574cde3757058707de8e6db6ac8fd1fc3b14280412663bc394c
font_01_sfnt_off00010992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 11364 bytes
SHA-256: 98894b718b2277b996be351bfd6ab74dc60ffb1e455b6a3305539ca55238b72d