Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2269df9d72649e…

MALICIOUS

PDF

78.0 KB Created: 2021-03-30 23:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2f8e9f4625b5b7c39c078bb2482b7343 SHA-1: 80c217dcc5eeea54f01a0303b1a4db7dba14b3ba SHA-256: ab2269df9d72649e3af3988647d2042fad7d4704db8bf9dedf8edf61ede48195
186 Risk Score

Malware Insights

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

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 0.9990

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 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.
  • 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://xezojetit.ru/strik?utm_term=avital+car+starter+reset PDF link annotation
    • https://cdn.sqhk.co/bitizulokiva/ucEuhhL/disney_labyrinth_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/djcjjif/nugosijifozisiwoxanok.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/jfWigjh/wasonowafino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_603e6f2ce908b.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/jheHij4/word_games_for_seniors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fda0aadd8734.pdfIn PDF document text
    • http://leludezoz.scienceontheweb.net/behavioral_addiction_treatment.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/ghf9DEM/fiwamefutop.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/bin_sachivalay_clerk_exam_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ifhijbv/besewujib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6009de25ef482.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/71756798445.pdfIn PDF document text
    • https://cdn.sqhk.co/nabixisaf/Pid2ib9/barrett_jackson_northeast_2019_tv_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_6038c2b3f324f.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://34fef40c-4934-4c56-b24d-59915ed92566.filesusr.com/ugd/806295_ccfbd2b0c71543ababd80d85fd00bab3.pdf?index=trueIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_f66e41edb80c4869abcf3b164ec0e42f.pdf?index=trueIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_0cb69b616d1248a2a83a5066cc7ebcea.pdf?index=trueIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/cours_anatomie_de_l_oreille.pdfIn PDF document text
    • https://a01f0313-f680-4530-87a9-ce77a10bb621.filesusr.com/ugd/ac0554_d531f7455b52419dbfdd6cc6e850ec7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fddc6d21-7d0d-4651-9178-849b7472c55f/what_training_is_needed_to_be_a_real_estate_agent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c81461-4bff-4c8b-a7ce-80db84454f94/95488479255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ce80c2-8331-4127-9de0-be517f9d90eb/unleashing_mr_darcy_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f08a672-1ab9-4c6b-bf54-5e8c055bdf6b/how_much_does_an_animator_make_in_japan.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_09e4842ad0c74554a70b6060801aba3f.pdf?index=trueIn PDF document text
    • http://kofepiropi.onlinewebshop.net/14102240475.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_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 4416 bytes
SHA-256: 3d00d96b92b9737c9d670ba2deb02e7dc327767676dd99bb1e996e559476017c
font_01_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 10996 bytes
SHA-256: 433754b8a67554b1418672391a7c51d88bc515ae7af184489aba30d86d7517d5
font_02_sfnt_off00011af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3