Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02c0a026be5ce81…

MALICIOUS

PDF

70.6 KB Created: 2021-04-03 19:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4a0e85fa70c8c1d5fc9339eeaeb8da79 SHA-1: 53b9f2463f089081251d154aad40efa99461d3e0 SHA-256: c02c0a026be5ce8192189330d1bf9a7aa0b34243664d2bc8af1fc825a83b1746
156 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 0.9993

Heuristics 5

  • 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.
  • 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://bologen.ru/wix?keyword=chicken+genetics+gizmo+answer+key+activity+b PDF link annotation
    • https://cdn.sqhk.co/zaviresodew/hjchffv/tavatefoturusekukini.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/aEZxidV/personal_assistant_jobs_los_angeles_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/BH2ypif/personalized_battery_operated_candles_bulk.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/aHLjilN/pico_rivera_california_news.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9bf2cdb-c187-401b-aa4c-334bf94cee86/is_blood_hunter_good_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/dutabi.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_563f025841cd4e0eb9c4b3f042daefa0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f3e0ec-3f5c-4bfc-8218-7931908128c6/how_to_turn_off_first_alert_carbon_monoxide_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c3cad9-e47e-4484-aa94-929109c75c25/sappho_quote_franny_and_zooey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5bd88d-c764-4022-afd8-1f248e7d012a/30960597221.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/feasibility_report_in_project_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59310f5-2377-4623-a7d4-8aa7487cb7af/4922516607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d666271-783e-4453-a373-b4ec2992516c/7111134927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2314c4a-54a8-44a9-885f-b5d254fdebb5/33228800974.pdfIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_6725eb9686d94c40a0cc8402cf35dfaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3319ea-0388-4351-bf1c-b41ebf8368ae/lasisegorovi.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/nostalgia_ice_cream_maker_recipes_cookies_and_cream.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/kobuxefegisujojoxobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7bf4b9c-ef08-45be-8d6d-30b30d441d1f/gejajixovoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f560b2d9-7bf1-4d0b-97f2-e45a7e5a5c2a/samsung_55_inch_tv_sound_no_picture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ec5f35-30af-4b99-b57b-4cda53e2c27c/niwerikusubunefarepebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a38f20b-db9e-4889-9fa2-24161daeefd1/blackmagic_design_atem_mini_pro_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/falip.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_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 5596 bytes
SHA-256: 1dd25bd8726a03b7bb0fc86c3939dfe9d51026734c2babb88402512b7dcee059
font_01_sfnt_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 10656 bytes
SHA-256: 989538568ed3d02d942de6c37af090579ca74f831b97d8629c9b4b6e7de1a962