Malicious PDF — malware analysis report

Static analysis result for SHA-256 965d71e2c0566e5d…

MALICIOUS

PDF

138.1 KB Created: 2021-02-09 00:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 522e0d3fd0a09e1239e02c5c70bccc02 SHA-1: dc02827e3de206232a0e5ced745ff32d5e7e670d SHA-256: 965d71e2c0566e5d9ea6754ea69fb381128488d75c7bbb1a20236e98a6714752
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive linking pattern suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/wb?keyword=naina%20barse%20rimjhim%20rimjhim%20video%20song PDF link annotation
    • https://cdn.sqhk.co/febenapox/MeiaZhc/vomogosuduluta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494440/normal_5fcc0828ae637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fcc2fa1ec2e9.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/diCjOha/77657241359.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/aifgfU8/54469319037.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/dBdmnoL/15638780773.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/g1ifOVj/walking_dead_rick_movie_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_601585a19d81a.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/eWGhbic/brilliant_distinctions_app_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5fe15eba2ad14.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/85508582962.pdfIn PDF document text
    • http://gaxazoxisis.22web.org/bartender_ultralite_9._3_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd61899025d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://ritanuwo.epizy.com/nezodidapetekanaxe.pdfIn PDF document text
    • http://kevusej.epizy.com/92407077373.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/xobevulimiwuluzuraxavu.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/chemistry_trends_in_the_periodic_table_worksheet.pdfIn PDF document text
    • http://mobopufo.rf.gd/soul_music_s_websites.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/pijaxalib.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/39928660482.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/numidojipu.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/83607399556.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_off0001c529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C529 5452 bytes
SHA-256: 7def7645eb9829d6e4daf189e7577dffa0b1ab45093e7cae8bd6e000f58fb849
font_01_sfnt_off0001d79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D79F 11492 bytes
SHA-256: 8c50c2a2147e689ec3e50343a767add0ba64b5ce5751454a7ade26ec426cb532
font_02_sfnt_off0001fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE4B 8132 bytes
SHA-256: 0b0c32d322a00556ad30b07572c8a5bc55c96b9818c8f7257221d44a53db8873

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