Malicious PDF — malware analysis report

Static analysis result for SHA-256 441d7f425fd32d27…

MALICIOUS

PDF

71.8 KB Created: 2020-12-21 08:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d7b77d033905dc57287d9b641cf49c5d SHA-1: 74b443b96076f8f84f822e3df12e13e1b30b02bb SHA-256: 441d7f425fd32d2771f0eaebee80317c1a5b350b65e34b160b3f242f339622e0
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate a high likelihood of malicious intent, specifically related to phishing and link farming. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing sites.

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 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://traffking.ru/strik?utm_term=evolved+dragon+blade In PDF document text
    • https://static.s123-cdn-static.com/uploads/4447466/normal_5fdf9208185f3.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/dovek.pdfIn PDF document text
    • https://patinijogu.weebly.com/uploads/1/3/4/8/134854147/lutomakazoxekopupilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_5fd17205eb9d9.pdfIn PDF document text
    • https://jufozovujibozom.weebly.com/uploads/1/3/4/3/134360308/78407dd55d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ab24a4-8210-4f42-80b3-345309c73bc5/bdo_warrior_gear_guide_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/mark_bowers_tree_service_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/15215253124.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/31333058206.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/24024862404.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/nagukiloxanewuza.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/48239576771.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/93345292863.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC500 4340 bytes
SHA-256: 4c68c4c5c330d64053b55ce89feeb4bd4c0360804fe7bcc5fe8499d7de0af60a
font_01_sfnt_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 4972 bytes
SHA-256: 1ccc93f1c87b3184ea783346db86156255f0c67713b892a0dd6c7a54dec16851
font_02_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 16612 bytes
SHA-256: f04c7ee7d517cc62f9c663e2c93151c09176a794f4a674835bcb9869c476c10b

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