Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbb49c8ec35b8de…

MALICIOUS

PDF

75.2 KB Created: 2020-12-19 08:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b957a7c7dc9d6b4137bb150c1fcf2788 SHA-1: 91f417b1815f76d2ddd0baf7a710950fa825ad2e SHA-256: edbb49c8ec35b8debfe53a4e4da1ebb73cdd6aee2a16c49ffc0d05cc329f338f
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://trafffi.ru/123?utm_term=mutual+funds+for+dummies+6th+edition+pdf+download PDF link annotation
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/kukor_zegik.pdfIn PDF document text
    • https://paxepufa.weebly.com/uploads/1/3/4/6/134640660/c31f7cc3.pdfIn PDF document text
    • https://kivepuwepadile.weebly.com/uploads/1/3/4/3/134392404/fovibobibejukufasova.pdfIn PDF document text
    • https://pejijogukuto.weebly.com/uploads/1/3/4/7/134768892/wovamog_pebixifimegog_zatibugesebovo.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/pomesaba_vemedad_kevelat.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/redagazogava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2b26e405d5340f3353adc/t/5fc81d55e21c7c679ad71864/1606950229733/nosinutenavunosozek.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/46680707591.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/xuluzul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd45c3eb685147a09c264a/t/5fdd89285809ae3434e8d63d/1608354088590/xukodewoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8179a396-3aaf-4ed2-870f-a69a537172a8/desikatovugufuveforemala.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/interview_questions_on_control_systems.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_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 5532 bytes
SHA-256: 65d304405667b8b363664e23008ca5ada6043f81c4d9e6ac7f237e75f3b6f822
font_01_sfnt_off0000fa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 10928 bytes
SHA-256: 811dbd633e146c56a71bc907688a5fe039a95d0435c6b20fbeb9dfa15fd346a2

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