Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54dfc1147035f5c…

MALICIOUS

PDF

76.0 KB Created: 2021-03-26 12:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c21d1c35eb32041dce0f2acbb0cf0f83 SHA-1: 08d3f21d2f7d1c93416d32b88dcb78d4dc87346e SHA-256: e54dfc1147035f5c9dd54c0a8328aa4027785535896e1284fff5d53b333e097c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=dnd+character+sheet+word+template PDF link annotation
    • http://arm-watch1.club/is_illinois_going_to_tax_retirement_incomeazr3r.pdfIn PDF document text
    • http://classkaod.ru/katy_perry_roar_mp4_songzgpr2.pdfIn PDF document text
    • http://jadebey-x.com/menekusawijijeymn3k.pdfIn PDF document text
    • http://molotkov.site/advanced_internal_combustion_engine_book6hfox.pdfIn PDF document text
    • http://sayfelengs.space/gizomofetalivefomx3dm7.pdfIn PDF document text
    • http://reduslim-sito.site/69601959214wpdmx.pdfIn PDF document text
    • http://letnesil.xyz/zegunok2d7wv.pdfIn PDF document text
    • http://50offit.pro/pojurumaronuqee58.pdfIn PDF document text
    • http://fullhp.info/space_rangers_earth_37rc2um.pdfIn PDF document text
    • http://remont-kholodilnikov.website/mepixaleburqk9z.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/daraniwekamidir/black_hawk_down_characters_real.pdfIn PDF document text
    • https://f0ded7c6-1882-44c2-b580-3fd8daacf182.filesusr.com/ugd/1cd4ca_5b396a81f1734f68ab0d3688bc491496.pdf?index=trueIn PDF document text
    • https://e6343aec-df69-40e7-9959-3c0c55bf73c9.filesusr.com/ugd/6a9017_a1ed5f75aecc420b88f75f4ec5cf380a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/online_certificate_design_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/marshall_headphones_major_2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/avolites_pearl_2008_service_manual.pdfIn PDF document text
    • http://sebubexegan.rf.gd/confusing_adjectives_and_adverbs_exercises.pdfIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_97d8e21ecdec4528aa2f6ef61410dca1.pdf?index=trueIn PDF document text
    • http://patazave.epizy.com/nabelavimitufowegolirefan.pdfIn PDF document text
    • http://zebepireliwidoz.epizy.com/83005758277.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_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 5404 bytes
SHA-256: dfbf423d69be2b0d487e2d4f32ff38c60904746253527a185bb1049f2a2dde68
font_01_sfnt_off0000fbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 11444 bytes
SHA-256: 95f1f4b0d7a32c49ebceec393b72c865fcfcbe39c987857cd7bdc277d372ac25

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