Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe07a49a5b82de0f…

MALICIOUS

PDF

63.8 KB Created: 2021-01-11 07:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d65c908c192e4079781e30545b280c93 SHA-1: fd6c6436370df3e29dfa3bd674c4e313511d872a SHA-256: fe07a49a5b82de0f9151894f4a76d16c7c76daa7368c9df1307e72e71e381519
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for phishing purposes. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://cctraff.ru/123?utm_term=ben+franklin+elementary+la+quinta In PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/d0e73e.pdfIn PDF document text
    • https://kajabukege.weebly.com/uploads/1/3/1/3/131379037/nuwaxerutakive_rivagew.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/zerida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5fdc12b2cb764.pdfIn PDF document text
    • https://site-1172915.mozfiles.com/files/1172915/visit_center_city_philadelphia_zip_code.pdfIn PDF document text
    • https://site-1175626.mozfiles.com/files/1175626/mini_golf_club_near_me.pdfIn PDF document text
    • https://futikuvevu.weebly.com/uploads/1/3/5/3/135349420/96f6b830a6145a9.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/suradinazusosaso.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/wekibik/date_time_group_mil.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/kikokomab.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/1635544496.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/relataxevuvonadijuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/waste_management_webquest_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/xuwuvel.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/avani_avittam_yajur_veda_2019_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/gipazoxajalukowabaki.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_off0000bd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2C 5076 bytes
SHA-256: 09a783a891d59483a9131abf1e54f736059245aa574c83501ad328d6501c912e
font_01_sfnt_off0000ce72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE72 10504 bytes
SHA-256: 1ae7f1a39858d2b8aed1695882c4f5b22dbba8bf5b736286262aef7658d126a1

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