Malicious PDF — malware analysis report

Static analysis result for SHA-256 73dba5201d216d35…

MALICIOUS

PDF

82.1 KB Created: 2020-12-21 19:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8dcb9c0955a362fba3048e0241fc1353 SHA-1: 9733517a33eed0218898f0ba3428b6741a014a1e SHA-256: 73dba5201d216d35425a269231972733b69552cc0a6ca23eb8397acb432a5f34
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 0.9997

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://trafffe.ru/aws?utm_term=porsche+cayenne+gts+2008+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495240/normal_5faafd9f612fa.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/nituw-raperedod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f9cd8cc545db.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/donutelave_vulexifuwegijo_salipijuwevugaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_5fa3c1316d97e.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/pojifeguxuna_suzixunudekakak.pdfIn PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/7654354.pdfIn PDF document text
    • https://vafomelopujoxo.weebly.com/uploads/1/3/4/8/134864043/12203695c3.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/065a2a56-a004-423a-8f15-b2a56228a7e0/zajazuguzebigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d541ce30-2d34-4b8d-a3a9-e5500defeb47/44313108910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22961f24-600a-4e45-a528-1af4c46778ed/neutrones_protones_electrones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b1906d-0be6-4a49-af48-499e6c1a0251/mozumekigonokubalofaza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 5620 bytes
SHA-256: c030b997701f5cbdca9771908ab2faf86bcd7cdac509d298633a5307643f59c4
font_01_sfnt_off0001074c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 11136 bytes
SHA-256: cd7989c13d8d13d234085e91ded4ff37284965a72c19981b999d164c7db87def
font_02_sfnt_off00012d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D23 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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