Malicious PDF — malware analysis report

Static analysis result for SHA-256 2359409ae4ad5ece…

MALICIOUS

PDF

69.6 KB Created: 2021-01-03 02:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ece62cf5745492eb921113eebb094d62 SHA-1: 96e567808cfa8307d0cf9cd40e9c2500fa7103a8 SHA-256: 2359409ae4ad5ece7a803558fd9f4449e1c140ae5775602d26b6a096c1fdfc5f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to create a link farm or distribute malware. ClamAV also detected this as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=new+headway+beginner+student%2527+s+book PDF link annotation
    • https://cdn.sqhk.co/dufukeraj/exgegjS/walmart_cake_decorator_hours.pdfIn PDF document text
    • https://vokefuda.weebly.com/uploads/1/3/4/7/134709273/7600302.pdfIn PDF document text
    • https://nebowepef.weebly.com/uploads/1/3/4/4/134483035/mizozazop.pdfIn PDF document text
    • https://nojufetabug.weebly.com/uploads/1/3/4/7/134748112/8145976.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/tuxutedi/detixujogumamezakilox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e7363e-e14d-4ccd-a3d9-e258503e5af3/kisowogilufepakutirenezu.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/cfpb_hmda_guide_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2583c2-5c6e-45ca-add6-5b0d757b6262/fujugobezul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d0486f-9a57-41fe-a8f4-4ef09a880f90/infer_why_mitosis_does_not_increase_genetic_variation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea62bd7-deef-4015-98a2-9db945351f2d/wokoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d823c28b-af57-432a-ac5b-316f1e5fc2aa/theories_of_counseling_and_psychotherapy.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/72086559525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3279a2ce-a611-4e8c-a9ef-b355ddbd86c6/9108395083.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_off0000d2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C8 5456 bytes
SHA-256: c0f002e1262339baafac3be57329ae87ccfdc04330185c44f2f6d36d11fed6fd
font_01_sfnt_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 10620 bytes
SHA-256: 2d2a43e7e0be98f0b597bfb5d3854ae90fb9498ef16b4170cdb11ee529b36578

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