Malicious PDF — malware analysis report

Static analysis result for SHA-256 d335deb4b863bcc8…

MALICIOUS

PDF

71.7 KB Created: 2020-12-11 13:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 114dc5c56408c7dc5634b7fe8c6df58c SHA-1: 0c14cc903923c01f3643b52cf7d12b1ad7336b8c SHA-256: d335deb4b863bcc89dacdad9f3ef8414e625177592ce2d2a8ce55099f06945cb
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with at least one identified as a known malicious redirector. The heuristic firings indicate a high likelihood of malicious intent, specifically related to phishing or malware distribution through link farms. The ML classifier and ClamAV detection further support the malicious classification.

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/aws?utm_term=ballade+burgmuller+pdf In PDF document text
    • https://sajamokof.weebly.com/uploads/1/3/4/5/134599006/ee3e9e31236e9.pdfIn PDF document text
    • https://mapizijef.weebly.com/uploads/1/3/4/4/134493838/kiroruru.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/405763.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/xonisetad.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/fetukonavaga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc575db16f6d44b07dd545c/t/5fcccd86c836a917f90ad2da/1607257490678/the_outbreak_of_covid_19_in_world.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30fa5bda9c57a97cc46e9/t/5fc505964f983757207d25f3/1606747542727/55608539380.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/zuwojipawewibomuxaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624cf91f-feb2-43f5-b2cb-f0349df05414/sodujosomazimoxugijomadar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d978dc85-70a6-4a3d-966b-24628b46e6f7/silicone_oven_liner_bed_bath_and_beyond.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21e2fce462bc8c0024/t/5fce8add954712059b81e027/1607371485867/x_rite_colorchecker_passport.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5696860f2895dc1061537/t/5fc7ff86cf1895451d52a339/1606942599062/85154741232.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bf18affbf90a660bb862/t/5fd2089ac10336458b3cae92/1607600283383/pulafonelezujiji.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_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 5372 bytes
SHA-256: 384086b365282e85af29e6f1cf146f9b59f3e4f097085477f5b43ce081a96b16
font_01_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 10796 bytes
SHA-256: cdd3f3e0a568af5be87bcc6e13b6ec69a2dac5eb6a6f22ce991c4de902d86d7d

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