Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17158c3b9720888…

MALICIOUS

PDF

71.8 KB Created: 2020-11-17 08:13:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 262f8fab0aed9bcb8b4519af2227fe63 SHA-1: d8f9785dc6c63c0465eb9745d1850982b6b296eb SHA-256: d17158c3b9720888c50dd5aebc5ce12bc609313ef4560ab94e9ec1c1085012b1
186 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 0.9998

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://trafficel.ru/123?utm_term=lamiglas+guide+spacing PDF link annotation
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5fa178bc903ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_5faf649e52616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f8baf759ba24.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/jalupexavebadosuzuva.pdfIn PDF document text
    • https://kirobobu.weebly.com/uploads/1/3/4/5/134593563/vorikinamolamila.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/6323409.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/05b734d25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_5f9fd575afc75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f992d2da2a08.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/2548c362-6a74-4aa7-a508-399ae3506aa3/fiwegonufozesuwunowopag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c21dfb-eca5-4310-9e8e-544383f12d0f/kk_adam_film_izle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3016020-5f36-46b3-b16f-9b68e69926e6/dederisipigibigibev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e4e15b-ad46-4c7a-a475-d2831392f8b3/answers_to_fema_is-700.b.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/nusem.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/12107934848.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB31 5240 bytes
SHA-256: cb6b4b473276dbb4299e7e57a8743cead151187e0e98ecbf0169beb915611113
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 10916 bytes
SHA-256: e17652817ad78764f3adefd2b35a290f9102157cf97e1b890bbf7945460db1fc

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