Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caf2da9eb8384d8…

MALICIOUS

PDF

75.5 KB Created: 2020-11-14 10:34:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a81eac337c71032cca296f8b8ec74b35 SHA-1: b419a0e552acf9610af68e5b07f096903c1d7869 SHA-256: 2caf2da9eb8384d84e6379cd267cc24e4f305ad55950a73b53704bdeae3e1c94
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 0.9998

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://trafficel.ru/strik?utm_term=bedlam+job+in+raven+rock PDF link annotation
    • https://fisupipegapug.weebly.com/uploads/1/3/4/5/134515512/totitetosa.pdfIn PDF document text
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/jozukiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499341/normal_5faf417032358.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://s3.amazonaws.com/titugome/rejolivakug.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/descendants_1_script.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/energy_work_and_power_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/destiny_2_best_exotic_armor_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/92154160326.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/codehs_super_cleanup_karel_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/tekimevu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/organic_chemistry_for_dummies_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/panawiwox.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/60101219574.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/rowiki_ragnarok_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/letters_and_sounds_gov.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/76383824437.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 5004 bytes
SHA-256: b9ac16395ec7e7268ce9bedd4bf13e2da32bc5f5d9e189878cc59369b7dd53f9
font_01_sfnt_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 11288 bytes
SHA-256: 8c6ff15d284cb3ae3ea5d6847d8f3d12855da2b9de3dffb1e71f573908e8cfbf
font_02_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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