Malicious PDF — malware analysis report

Static analysis result for SHA-256 384ae8b71fbd1a71…

MALICIOUS

PDF

78.5 KB Created: 2021-03-01 23:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 71545f2b81db9638949f544bbcbcb9a2 SHA-1: b3962cbf4f50f7c06e90ebda2031bdcaa77d2682 SHA-256: 384ae8b71fbd1a71b2909e633e6b6e267bff65a9ae2c45bd37477b342e300819
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URL that directs users to a suspicious domain, likely intended to host a phishing page or download further malware. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=what+causes+a+false+carbon+monoxide+alarm PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417643/normal_5feb2511252cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366040/normal_5ff829b2bd976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382429/normal_5ff3b137a4157.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/art_of_unit_testing_2nd_edition_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5fe422e0e92f0.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/magnum_inverter_fault_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_602952db3ae47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_602064e2976a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_6035aeb263929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_600eccd19cece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_601412ccedbac.pdfIn PDF document text
    • http://ru-dev.xyz/kimufejalinuditonazuxu01mlp.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/45207374325.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464530/normal_5fe41a75e1e65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386605/normal_60046b783e06c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gedexim/can_you_look_up_a_child_support_order_online.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_off0000f530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 5480 bytes
SHA-256: 4bbb5692c0e0e7ac57ef83ed9e1620c8509a91bc13851a6f3c114a62b674d280
font_01_sfnt_off000107b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B7 10784 bytes
SHA-256: 5e5e225bd43e04e86bb79566d762ec9b72ec3a0d4fa03fc0126619b847c28e27

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