Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5f85ab0ca1a83c…

MALICIOUS

PDF

87.0 KB Created: 2021-03-10 02:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 11189f99aa2f4706b260b0f83171ea54 SHA-1: b717fc97d88bd5b6872f8ba734751dbce09e1e8b SHA-256: 8c5f85ab0ca1a83c714df480fb6990c03612176191a08af4341b43c23b2e56ee
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://seumenha.ru/aws?utm_term=cabela%2527s+8.7+pro+series+food+slicer+reviews, which is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/aws?utm_term=cabela%2527s+8.7+pro+series+food+slicer+reviews PDF link annotation
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/1963928.pdfIn PDF document text
    • https://janilanupaga.weebly.com/uploads/1/3/4/6/134673225/munerelulijar_lerotuwasive_kidomubeneku.pdfIn PDF document text
    • https://xuxuratedagofat.weebly.com/uploads/1/3/4/6/134644764/zenab.pdfIn PDF document text
    • https://wofovadorobonam.weebly.com/uploads/1/3/0/7/130739883/nazur-fekavi.pdfIn PDF document text
    • http://zakixezurel.iblogger.org/18652047028.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/kovigilexinavu_jopirenujisod_jukelilenam_gopevajusubul.pdfIn PDF document text
    • https://mewodufupojapoz.weebly.com/uploads/1/3/1/8/131857890/4461253.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/puposapixupawinejol.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/a2b45d51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobaziw/bts_fake_love_piano_sheet_with_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b30b2f0-c1d3-4d46-953e-bcf27aeabe8f/50567230391.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/adobe_audition_3_free_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7989429b-f875-403d-a33c-063093f3e3f6/how_much_is_hyperbaric_oxygen_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afb886d-7b74-4e13-a879-b1c472e78ed2/what_is_emotional_labor_and_how_does_it_impact_employees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7742368-0c6f-4edd-8eb7-f90076022579/29545623305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbc6717-6a03-41b9-9f36-d4ab2414260d/vukoniwufeta.pdfIn PDF document text
    • http://jibapasugaxelo.epizy.com/act_401-_22a_manual.pdfIn PDF document text
    • http://gawuvuv.epizy.com/holy_family_coloring_sheet.pdfIn PDF document text
    • http://tisumejokilufon.rf.gd/bunukunisapedebaxazuza.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/75358443767.pdfIn PDF document text
    • http://netixoxolasabo.rf.gd/eton_scorpion_crank_solar_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6e402f-70c7-4b44-bac3-026d4b91a28d/94019238205.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/also_sprach_zarathustra_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc547a2-7aad-44a2-a67e-cc1eb4f6916a/hexa_block_puzzle.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_off000115ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EA 5688 bytes
SHA-256: 74904e9190c2aae986eb641db41ded1f72832f021f9fa9f212cf4d69d25d6b1d
font_01_sfnt_off0001296d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296D 10612 bytes
SHA-256: a64255984a58a008f22cdb7d124b0ceb1e79846158938361d8211220c7df2eea