Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f34567cfe379a2…

MALICIOUS

PDF

62.7 KB Created: 2021-01-10 18:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d88f944a3f6d15749de88bd3b9b18fa3 SHA-1: 92661c558814774a4c20762e840d464d90107408 SHA-256: 75f34567cfe379a28c0ac253239121f7500854d5db46ef4eb377047209174c4a
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links and the redirector heuristic suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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=doraemon+title+song++mr+jatt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f95db570f6ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5feb2ff7d49b2.pdfIn PDF document text
    • https://site-1178662.mozfiles.com/files/1178662/rividewakudovafaxeriji.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/jobutarujuxupo.pdfIn PDF document text
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/baletavetikir-wikipemo.pdfIn PDF document text
    • https://site-1178750.mozfiles.com/files/1178750/my_singing_monsters_dawn_of_fire_breeding_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_5fa935815c846.pdfIn PDF document text
    • https://fanamariruzatad.weebly.com/uploads/1/3/4/5/134514157/547154.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/zikeko/cbse_private_candidate_examination_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/busojevizow.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5C 4140 bytes
SHA-256: bb5c894eca9bbacb8d0cb6e4086511006b3f8b0b706cea39f4ad546cc3e567a4
font_01_sfnt_off0000bb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB03 5080 bytes
SHA-256: 929466e9f86f75f20d88f453b93f2d3d48cab0711d39c0cd9c290385144aeba1
font_02_sfnt_off0000cc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC35 9900 bytes
SHA-256: 26483a30d8f5bb0c78138368a431ab57717dac248e7684564af2021f327e88c8

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