Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e9616c6e634671…

MALICIOUS

PDF

82.5 KB Created: 2021-02-18 15:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 293ad728b1a4814ea8b49ac72af2af6c SHA-1: dde6a7e90c52173960257c2284d70f8a649bd39f SHA-256: b1e9616c6e6346716e739a52b6247e6f5002cf3be130c1777b7f664341e23910
244 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The document's primary function appears to be acting as a link farm, directing users to various external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=swann+smart+security+camera+1080p+full+hd+wireless+security+camera+review In PDF document text
    • https://vezefujofebiv.weebly.com/uploads/1/3/5/3/135304234/zebatakenatafuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/ighfjfY/my_boy_gba_emulator_v1._8._0_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/aheae5J/19375883386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379034/normal_6007d249447e3.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/hcijhcj/wigoporadodojilekeneken.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/jdyjbjd/fruit_cute_drawings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6010cd27f2a6e.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/76072.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/Thi1idp/rome_total_war_barbarian_invasion_android_cheats.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/3952139.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/jijdgF2/wutumelaxalupewojovakobe.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/jdjhgie/91868254390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466664/normal_5fe5032a4d44a.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/NgeQ1jg/remamitasasipepewononodaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/jvQgfgj/thrift_shop_online.pdfIn PDF document text
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/judisekuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_601a535ca2f0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5ff255c75354f.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/cHF5Sgf/zombie_catchers_all_big_zombies.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/Ujbggj0/lucky_dube_songs_mixtape_mp3_download.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
    • https://s3.amazonaws.com/xefejevife/6900016443.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/japanese_car_auction_sheet_carused_jp.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_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 5912 bytes
SHA-256: 5afb8db7bd9403cf282100ac41c7b0ba509b3bafc237759da0954d8368fca02a
font_01_sfnt_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 10592 bytes
SHA-256: 9179ed38cefcdb13b72e310c3fff0f3a93590bec4ad22a3a752289ee6365329c
font_02_sfnt_off00012db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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