Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e67bfa32587a3a…

MALICIOUS

PDF

63.3 KB Created: 2020-12-24 12:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 86d1262634d3333550cc0e0d7fb9b505 SHA-1: ee3bc41899c9d26d5d8cd13eb0f6d7087a7749af SHA-256: 58e67bfa32587a3af56648b391e2525ced77c399b37fd73ea6208c4a7de05534
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous embedded URLs pointing to disposable hosting and known redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, contains references to 'teenage formal dresses australia' and the wkhtmltopdf application, suggesting a lure for potentially unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/aws?utm_term=teenage+formal+dresses+australia In PDF document text
    • https://static.s123-cdn-static.com/uploads/4499629/normal_5fcc13eb0e53f.pdfIn PDF document text
    • https://wokukome.weebly.com/uploads/1/3/1/6/131636951/xigebapuwu.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/xasotogubusagadax.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/ahajgge/famous_generals_of_the_civil_war_union.pdfIn PDF document text
    • https://rabebazenapaju.weebly.com/uploads/1/3/4/7/134771608/toxoxafo_fedusal_zubojejit.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/qiaggJQ/36517278249.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/lujuziro_zezekulita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_5fb83f53490e4.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/mafavuzenoliki/paparimusevefojuvomepobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b086146-d03e-4d01-8b79-05429a9696ee/dokafox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fab77d0-c6fd-4123-94d9-b6db9ae9ecc2/nikon_prostaff_4_12x50.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/bike_race_hacked_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c7f46d-7a17-4651-bfaf-709293a55f44/little_prince_quotes_in_french.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_off0000ba0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0D 5176 bytes
SHA-256: b09feee81490036c83e9272d658b3accafd9849f0592edfe7c9bbb0d4941ba86
font_01_sfnt_off0000cb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB97 10840 bytes
SHA-256: 7cf7b59933d03fea5b8b60f2cbec85de57706dc86157e8625471a74a2b9b92e4

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