Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24703a719881aac…

MALICIOUS

PDF

71.2 KB Created: 2020-11-20 16:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3450182fabb72e7ec00d96f6979e89cb SHA-1: 3effa2b7a74872b495518c306d8c9e37df4d50e9 SHA-256: a24703a719881aacc66c6174679184004f6cd1aa86a80626bf341c6c1dbc4e27
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=bubur+cha+cha+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f8e766f0bc9f.pdfIn PDF document text
    • https://pimakiwukusa.weebly.com/uploads/1/3/4/7/134712386/6883558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_5fb74da66065f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5fa1af74c0267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5fb293f16034c.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/bitafume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_5f9f10fe5615f.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/a182aa2e-3a5e-47cf-93f0-fa71d149c236/41738255634.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/6590051734.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/business_proposal_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/mp9c_guide_rod_laser.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/what_is_handling_in_destiny_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce096957-1f16-4752-bb24-c47031e78c85/oliver_collins_code_vein.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769099ce-3062-43d9-9e7e-ca5e15d5236d/31487700036.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/do_white_candles_burn_faster_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c6f0c2-d5a0-4e51-8e1e-8d2b335732d5/91208456322.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_off0000ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 3484 bytes
SHA-256: d450d0d809264655fa12c3bb9171bb4e3490260c1b23c210f9717b0c86dfba0b
font_01_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 5020 bytes
SHA-256: 3d150c4ec15bdc66161c5b79cb9d1c744eb82c28ddfc6b4f9ae241bc86c42b0e
font_02_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 10444 bytes
SHA-256: 9c123f9986a32cbd0af8f7084979326a8929791f395dcc7006bd56979dc5629b

Open this report in the interactive analyzer, or submit your own file for analysis.