Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9691701c5f8a526…

MALICIOUS

PDF

87.9 KB Created: 2020-11-14 15:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 00fedb4d027f0b780e1158494c21293f SHA-1: de80a87f15ecc52a7ac052dd1d16aa43083ef572 SHA-256: c9691701c5f8a52689f0a6d2c99b59d4e08eab1a14fd2292aa2551f835035f3a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://trafficel.ru/strik?utm_term=examples+of+sensory+details PDF link annotation
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/9125287.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/gikegukelegutuxedol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f9b04abba61a.pdfIn PDF document text
    • https://naxigekaserudo.weebly.com/uploads/1/3/4/6/134644932/61e98eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5faf592a6ac9e.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/9327281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f896aeeee18c.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/779a2bfb-2b66-4505-8962-3b0f70385cfb/56735108104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35741187-4fee-4796-8ffd-d3364b837a94/kuvemidididegekomubagiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08463f17-c2b6-4f71-9212-8c38b5240482/88244102380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84de8537-be77-48af-bb30-3dc9940fff77/82613229218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbec1773-c3e0-4c9b-9604-963e424de656/89527939285.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_off00010bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 5104 bytes
SHA-256: f3b40e8fb42fc6a622eb327d7c75275a9fa887e434eed2bd8c211bd7132fac43
font_01_sfnt_off00011d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2E 12984 bytes
SHA-256: ecac4a521beb6290f5764bee860927013907973b4cf982ae5c5ad55c144921ae
font_02_sfnt_off00014505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14505 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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