Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b7bc49f5ed1465…

MALICIOUS

PDF

65.2 KB Created: 2020-11-19 20:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a81adbb1e89b120ec708a9838259da87 SHA-1: b679636c1a5808a4436829c1e25a7faedafa6852 SHA-256: 00b7bc49f5ed146571d62bd6b68ed11889b36bfdeded8a542e91ce81524c469f
214 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The embedded URLs suggest an attempt to lure users to external, potentially malicious, sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or trojan-based attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=red+poppy+tea+towels In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f92c224bca03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f9711b388158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414514/normal_5f95c74a6851a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5fa11927150ea.pdfIn PDF document text
    • https://kutolimog.weebly.com/uploads/1/3/4/4/134435461/minaxoj.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/lapixexukom-pemenidite-todubuwi.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/jolozidabi/centrelink_application_form_for_carers_allowance.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/fizujalijejamobu.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/misa_en_espaol_miami.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/pufetamejudutegume.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/como_fazer_uma_assinatura_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/gonowavixotason.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/75331994404.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/187140697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99785af8-438e-43be-b99f-26a245f1f922/degagonaxusudevosameravo.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/monster_summoners_handbook.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_off0000bfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD8 5056 bytes
SHA-256: eadc1b5dfcbc2a52bc11e5fe08c132560dadad70baf53d484b074d3f55e7381a
font_01_sfnt_off0000d13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13C 11624 bytes
SHA-256: 4717f6e6847527632fe5df9c41cb791c638d7c6d97f4bf01da5e1a67df2b19a8

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