Malicious PDF — malware analysis report

Static analysis result for SHA-256 9914941c59f03fc7…

MALICIOUS

PDF

73.0 KB Created: 2021-01-11 17:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 59a0951ff7adca0bf1c0e7b5c723f03f SHA-1: 149c81d341b189d2eba19d81c373eec26eff03e8 SHA-256: 9914941c59f03fc796945481d165e3bf0a4a3c99b0cb57e14b508628f9d35cfd
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to direct users to potentially harmful external content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://trafftec.ru/aws?utm_term=reporter+online+lansdale PDF link annotation
    • https://kezobonuduwu.weebly.com/uploads/1/3/4/4/134457579/9729626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f8d514ebb716.pdfIn PDF document text
    • https://site-1166082.mozfiles.com/files/1166082/kingdom_rush_origins_mod_apk_4_0_12.pdfIn PDF document text
    • https://xatufatug.weebly.com/uploads/1/3/4/5/134597760/powajijojomefuse.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/9592506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_5fb29d0bd4b23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426941/normal_5fdee8f7712f2.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/hgjanjR/tusaviwezene.pdfIn PDF document text
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/2959146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f89ddb2c51b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_5fb4f245b0e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_5fa2effa28cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f8f745a3f711.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/a46bd55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5ff452c2e2f3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 4960 bytes
SHA-256: 55b7e4d6616622ccb933fb4d6305031b2529ad860612d8a3c6e90d45ac1f7bb9
font_01_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 10672 bytes
SHA-256: 4b1ae3ad6c59ae7e3989e419db00c749fe17a6bd72fc5c035b082eb37b685bb1

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