Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae74c94f19d1e18…

MALICIOUS

PDF

101.1 KB Created: 2021-05-11 09:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d94f8b4e9f177021a05a3255dba488fe SHA-1: 2708849a76b9e16346a3cc7654c8df2768ad7a48 SHA-256: fae74c94f19d1e18afbb681b623a9964a3f0b9bb45b0e83c14c23333668b435c
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URI findings point towards a malicious document, likely delivered as a spearphishing attachment, designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=dirt+devil+pet+vacuum+walmart PDF link annotation
    • https://cdn.sqhk.co/rowazazapa/dsJOibq/capsa_susun_boyaa_for_pc.pdfIn PDF document text
    • http://i-men.ru/dometfszgu.pdfIn PDF document text
    • http://obzorov.site/586607595442aar1.pdfIn PDF document text
    • http://accueilcmb.com/pathfinder_player_companion_familiar_foliok6yak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_6052fda766112.pdfIn PDF document text
    • http://cleanup-sale.site/abc_song_lyrics_uk6ojk7.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/basic_ielts_speaking_free_download.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/acer_aspire_v5-471g_i5_specs.pdfIn PDF document text
    • http://imedo.ru/stokes_equation_weak_formw19dh.pdfIn PDF document text
    • https://cdn.sqhk.co/naruxibe/hfjaVhi/stores_that_sell_comics_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/Xmhd1bw/oklahoma_unemployment_latest_news.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445726/normal_6049d5dc743f7.pdfIn PDF document text
    • http://fafabil.getenjoyment.net/chhattisgarh_budget_2020_19_in_english.pdfIn PDF document text
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/8447771.pdfIn PDF document text
    • http://feelslike35.com/sample_letter_to_the_president_of_the_promotion_board_army5d73t.pdfIn PDF document text
    • http://krokoboko6.xyz/17870798901zke8u.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/associer_des_ensemble.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/3f56cb04.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/iiibDYh/jisesiditenuviwefozudiwuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_5fd8a6c46955e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5fd272f24ce83.pdfIn PDF document text
    • https://teputire.weebly.com/uploads/1/3/0/8/130813428/7748784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jelunegizubu.atwebpages.com/vosinibikos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B4 4860 bytes
SHA-256: e5680ef189c21ab1e89844ae0a28d2e97b905869d5840bca540dcaac3ab1094f
font_01_sfnt_off0001384f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384F 12528 bytes
SHA-256: 5fd3a5ed246d8be7c856e15706a56c228a80b0dca0dacc7a470b59f3ad09e6c0
font_02_sfnt_off0001628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1628E 16204 bytes
SHA-256: 73bb1f519e29941fc98367ae33a8b679223d41029fbf73fb5c585da9ec8c2502
font_03_sfnt_off000177bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177BF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176