Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7a79e816742264…

MALICIOUS

PDF

91.7 KB Created: 2020-11-19 07:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 27e044081b120e05c22804b0409e5562 SHA-1: 2dd21d04a15b3b30bcc4530b11ef0fdcc7d0e475 SHA-256: ab7a79e81674226452510a8b14718509b772b199946608705e408594de43dfed
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 0.9995

Heuristics 5

  • 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.
  • 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=crimson+skies+pc+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445754/normal_5fa2150e4dec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f8a8af904bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471096/normal_5fa3a30acc610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f88df77483a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fb3ea0887b27.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/binafevabaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f87cc48b4580.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/6f3db5f9-38e1-4162-a3df-eb4cb9b4809c/arcadyan_prv3399b-_b-_lt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a39319-6377-4e54-8630-ad3238cf6d7b/bofidoguxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f54d27-4777-4a6d-a72c-06a19174cacd/.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014633.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14633 17976 bytes
SHA-256: 8640ea7129e0dff5336ce9f984338a16a2ae249f7c4796383375a93336542b9d
font_00_sfnt_off00010d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6F 5048 bytes
SHA-256: d6bc6bcdb551ffb7d4b7f4475384ef68043e4257d9b56513e4bad4f1afd7c5f9
font_01_sfnt_off00011e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E82 12680 bytes
SHA-256: 8a4d0e5d9fa53762fe2e13f0ff8b1ba0849822a787a904651b8f6d8fd23ac469

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