Malicious PDF — malware analysis report

Static analysis result for SHA-256 04464c5f316b63f3…

MALICIOUS

PDF

81.1 KB Created: 2021-04-01 17:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d7e3099fa276bd71eed55cb10b071a5b SHA-1: 0e8309b8825bca4cf5e39a6beaa1fdff539dbb94 SHA-256: 04464c5f316b63f3acd9f4a49b15af3c9b3a8e374a6cb7c271d9f5e7b99656ba
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, indicating it functions as a link farm designed to redirect users to potentially harmful websites. The presence of multiple disposable hosting domains and UTM parameters further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://midufefew.ru/strik?utm_term=atlas+618+lathe+belt+size PDF link annotation
    • http://neledaxiwogume.iblogger.org/color_print_test_sheet.pdfIn PDF document text
    • http://lonedowubolile.iblogger.org/40607386815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386839/normal_5febee48681e1.pdfIn PDF document text
    • http://ganalozugimak.iblogger.org/51363074767.pdfIn PDF document text
    • https://misevitazivizux.weebly.com/uploads/1/3/4/3/134376704/df1c61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_604754d2782e7.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/poxudoziruji_zirim_zosigilexo_wesoziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_6042c54a65fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_5fd80f09156d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_6035657824494.pdfIn PDF document text
    • https://seligelota.weebly.com/uploads/1/3/1/4/131453084/ca84f806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_603c834398111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_603183b8a88dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_601bb5daaeb74.pdfIn PDF document text
    • http://rabifew.iblogger.org/22498047811.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/fefurorobumi/59725223871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a603bc9-c077-4fad-ba9e-572b14d79995/what_passwords_can_john_the_ripper_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022f47f8-bc3e-47ed-a896-6a6dab6f3b73/2020_lexus_rx_350_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9d110b-2df4-465f-b9e1-c414c9da5c2a/letter_of_intent_template_to_do_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c13f3d-6e4e-41d8-b86d-e84c39352cb6/88257772316.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/billi_billi_akh_khan_bhaini_song.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_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 5256 bytes
SHA-256: d7b09a9021b2c161f7f454c740bdceb220c3ee2d73c95909f646052aa23a035e
font_01_sfnt_off0001117a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117A 11152 bytes
SHA-256: 8e5782aa1f28dec4a5964046c05ca7b47b4259d92a59a5ec5ba7b0c43cafde03