Malicious PDF — malware analysis report

Static analysis result for SHA-256 4947ea798cff676b…

MALICIOUS

PDF

80.8 KB Created: 2021-05-26 12:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4cd18bc7b89d24ce0af3ab6c1d1cd1d5 SHA-1: 51cac3f39865f59f5dea6407e2be2bc4e2ebfabf SHA-256: 4947ea798cff676bbb2344da895f679dc35ff1f3015daef1230d99735c729e00
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 0.9995

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=hello+neighbor+2+alpha+1+release+date PDF link annotation
    • https://rowafitiw.weebly.com/uploads/1/3/4/6/134608100/5890768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_605d8593bb252.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/fumozu_wodowiludo.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/106e807d6d1ac98.pdfIn PDF document text
    • https://keninowe.weebly.com/uploads/1/3/4/6/134617270/2478177.pdfIn PDF document text
    • https://bobitakakafaze.weebly.com/uploads/1/3/5/2/135297082/ranoranexesobag.pdfIn PDF document text
    • https://sujebufapu.weebly.com/uploads/1/3/1/3/131379792/wopakid_dakotitebi_lozikalag_gupapodojujevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5feb96ae66120.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/d8d10cf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487935/normal_5fff14591e3b6.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://uploads.strikinglycdn.com/files/ea65f7ef-6754-48de-85ac-69dd76372508/94409723938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5a3bc2-17a0-48b9-ba1b-3a79e704bc0c/what_are_sodastream_bottles_made_of.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/48171735445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f9f8fe-7999-4509-9aa3-251d09c62600/72252024366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f63b5d1-fc39-4739-ac3a-a897a751f8eb/5329630431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8066f88c-176c-42bc-8887-ac2f07a6e2a7/how_do_you_write_a_narrative_essay_for_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/autodesk_viewer_dwf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4934b8-bc37-42aa-9f49-119ccc9ed8fa/15181837003.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/free_will_legal_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd27ced2-d400-4e60-8687-40378d78ebb6/how_to_start_freestyling_rap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf80a72-43fb-4bad-b529-27b2111c049f/2wire_3600hgv_gateway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eacb0dbd-c444-4b9b-825d-aafa11e31b71/fedex_printing_online.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_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 5292 bytes
SHA-256: 541ccd0b2facebc2983877158db5140d1b5f95c23b2187356657d3f4f2c554cc
font_01_sfnt_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 10200 bytes
SHA-256: 164e06fc08209f82053c6ed9d88335b825f9e3626582b08b2c8885b7c7cabd44
font_02_sfnt_off00012779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f