Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda9b2299bbce2d3…

MALICIOUS

PDF

70.2 KB Created: 2020-11-11 13:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4590507a57360f3d130fa16d5b12383e SHA-1: ef6df3a6df8c5e4f54b855dd001a4a6cdccbb7bb SHA-256: bda9b2299bbce2d31d68ae7df637e608cf0098da5f059ee1cfa11e1132333567
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?keyword=reglamento+de+futbol+rapido PDF link annotation
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/jatogolinufere.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/02da41e3-5b87-49e5-b558-b3d35d3df5d1/96759111908.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/when_mr_pirzada_came_to_dine.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/subofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f66b0e-0868-48b3-a929-054f208676e7/99675612291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0ec707-e9cf-4e18-8f3a-7732293436bb/zoxibekesalogabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b2a947-336b-4c0a-a15f-9e5c6b5a8ab0/zanusigogokipudawazukajes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vajurupubopipal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230b6c02-7297-4014-941f-227273b3568a/analisis_sistemas_electricos_de_pote.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/55037227102.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/26694197602.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/89849234571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b5f8b3-c11d-4d9e-9b22-bf25a391870b/80543188475.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_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 5212 bytes
SHA-256: c8f8146189896df083119d3761b7c13ea524b04e187173677bc3f98b1fe7c2dc
font_01_sfnt_off0000dce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE1 9760 bytes
SHA-256: 9b5b554d95da0c490daae51be15eb62105a0e3739235645bc489ebdfa546c4ac
font_02_sfnt_off0000fc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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