Malicious PDF — malware analysis report

Static analysis result for SHA-256 7087a02b69ca5f2a…

MALICIOUS

PDF

70.7 KB Created: 2020-11-25 22:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: db6b87a367bfe0dcf83a200005c2500f SHA-1: 53730c0f7076c8455e899ef64184711a0dfb7d27 SHA-256: 7087a02b69ca5f2a4810b8e12457c2ed0db81ad0e6d59260ac0280262546cdf1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=adobe+audition+cs3+portable+free PDF link annotation
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/e8631.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/wivafepaferoxow.pdfIn PDF document text
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/sorijega-rejotojed.pdfIn PDF document text
    • https://niwewuvikade.weebly.com/uploads/1/3/4/6/134629185/guginuti.pdfIn PDF document text
    • https://xamaboku.weebly.com/uploads/1/3/4/6/134606559/rubekamopoput-tapamigo-zisezuf.pdfIn PDF document text
    • https://numuxubolab.weebly.com/uploads/1/3/4/3/134382028/zulodawudig-jekidusilokuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f8b69cf23d75.pdfIn PDF document text
    • https://burubigek.weebly.com/uploads/1/3/4/8/134884838/riwuz.pdfIn PDF document text
    • https://xavupavise.weebly.com/uploads/1/3/4/5/134584264/2914512.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/tunugega.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/cf1e46b5-2201-4266-9135-c8f8bdc8532c/gb-_22_pistol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbd2f65-d1d0-45ac-85f4-bda7fb1999c4/unicoi_county_public_library_erwin_tn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f22a105-e5b4-4dfe-a4cd-e1d611421d8f/sovupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90640cac-265e-40cb-9ae2-f0b6f952a40d/kufezobele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60bba95-1d2d-432f-a081-095b72bf4c1c/nenux.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_off0000ce98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE98 5444 bytes
SHA-256: 7e95d7703d5af56fd2754a6f56eab089a750c32d2f5fa7a22bc7107b6a518e05
font_01_sfnt_off0000e125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE125 14504 bytes
SHA-256: 002083145c5683fe0057412ad4634f9e7a2dd9f2a873abee529bdc6c1d969988

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