Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a4c99021cef569…

MALICIOUS

PDF

77.4 KB Created: 2021-04-05 10:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fcb4254d363bb63a3809868d9c2a1a27 SHA-1: da92f9574195292395d5752f0136c963ed0be88c SHA-256: b2a4c99021cef56969ed3930e686420451bca4ec729f00cebdba29c08a5b071d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/123?utm_term=weather+report+bangalore+karnataka PDF link annotation
    • https://cdn.sqhk.co/bufudoraxala/jbggiez/phase_10_world_tour_frames.pdfIn PDF document text
    • http://xawikeroteguvu.iblogger.org/40131517310.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/gdIHgjM/amazon_seller_app_store.pdfIn PDF document text
    • http://zavodtriumf.com/xekomghd53.pdfIn PDF document text
    • https://cdn.sqhk.co/bogonelemid/jeu7gcz/31503671580.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/jjguYm5/lawupurogapuwidejoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/ijicOgj/lowolemefelomab.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/OjbKJlo/easy_flower_pot_painting_designs.pdfIn PDF document text
    • http://vk-settings-change.online/loregevabusenu4o9q.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/rjagdhb/list_old_school_r_b_songs_70_s.pdfIn PDF document text
    • http://onlyforyou.space/tazisurlxaji.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/agihhgn/norofifuvojepulepejuw.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/zgghgiX/55962517075.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/18037331483.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/lalupulo.pdfIn PDF document text
    • http://mesikigodijope.mypressonline.com/octet_stream_to.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/eNU94Hm/21166270756.pdfIn PDF document text
    • https://cdn.sqhk.co/gimovitax/Ghgie8E/jenegoduzezaxatukunuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/7sGCWgd/gubesinekenejulon.pdfIn PDF document text
    • http://passive-income.ru/monalixuronibonasifugozat9uc9k.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://peruroz.onlinewebshop.net/81040215510.pdfIn PDF document text
    • http://zozupajekuledus.myartsonline.com/deep_learning_nikhil_buduma.pdfIn PDF document text
    • http://fokogemuzaraw.epizy.com/vuxuse.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_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 4860 bytes
SHA-256: 37394f59db32194099c4ee1fe1f7e42d19d4abe92e4166164bac1a4594772e08
font_01_sfnt_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 11056 bytes
SHA-256: 82e60df40bfed4c6d29d94b946de8326eb3182dd7a54b533a2a54fe45b0d6bdd
font_02_sfnt_off00011a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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