Malicious PDF — malware analysis report

Static analysis result for SHA-256 31399f49674d9941…

MALICIOUS

PDF

74.1 KB Created: 2021-02-23 02:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 264ddbeee7326307f2e8c6bfc58dcb05 SHA-1: 1e6fc540a08ea03eba14e511c98065054d1dfb20 SHA-256: 31399f49674d99417c9bd7b58e974fc080758d5635429edd28926be0f7460fc1
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain, likely intended to redirect users to malicious content. The document's structure and numerous links suggest it functions as a link farm designed to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jottigo.ru/strik?utm_term=tesla+model+3+long+range+lease+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420448/normal_6032d0ccdcb07.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/pukagofana_gopajakoduv_texuxe_wigavo.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/ade3c7ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_600d0b73a2537.pdfIn PDF document text
    • https://bimipesetasezi.weebly.com/uploads/1/3/4/0/134017520/gipotava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fcee810b4582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fef1847a9e1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388062/normal_5fce05237daf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458615/normal_5ff81a33c6ef9.pdfIn PDF document text
    • http://kanshoper.site/sujoletiniffx3yy.pdfIn PDF document text
    • https://puwilufe.weebly.com/uploads/1/3/1/4/131407694/pomomebelefa_lotefisup.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/1944554.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/gujozomaru_zezifo_padepebozubaxaj_litere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_6000f40c270ce.pdfIn PDF document text
    • https://guzovadolo.weebly.com/uploads/1/3/1/6/131606502/8e0b37a739.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/bededuxotulapil/36709316982.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/cido_laurico.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/monasozobekotegijiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/rukawar.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/21604333849.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_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 5508 bytes
SHA-256: 2feccd1413e8e99091491a3d44a8255590b9cfa06cd5f26eade8aebb1464ee39
font_01_sfnt_off0000f60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 10892 bytes
SHA-256: 75bbdc93f60fb3823daf5329cc5238530e09410b9a45c09a34fb60eb3e312477

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