Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1b081569466f24…

MALICIOUS

PDF

105.6 KB Created: 2020-12-31 15:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c2c115c3826df99825479c0c5a056fff SHA-1: df9edbe4d8720dac25553659aa083ba8eeaf313a SHA-256: ae1b081569466f242e1865ddead297a855654e06485de17804e318ccdbfa4782
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'traffking.ru' and a link farm hosted on 'weebly.com'. These heuristics indicate a strong attempt to direct users to malicious or spam content. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=mortal+kombat+11+ultimate+ps4+release+date In PDF document text
    • https://pumujeguda.weebly.com/uploads/1/3/5/3/135330988/xopodurud.pdfIn PDF document text
    • https://zefisuket.weebly.com/uploads/1/3/4/8/134868467/4621341.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/kagaruw-kenirajalim.pdfIn PDF document text
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/d78d45c5d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f9506844c8f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369797/normal_5fc4318b10e60.pdfIn PDF document text
    • https://sulasaboxa.weebly.com/uploads/1/3/4/7/134767053/gujisad_serofow_juderodevuza_vagesibed.pdfIn PDF document text
    • https://nipefewemaxu.weebly.com/uploads/1/3/4/3/134387654/xiwoxedowulala_besebemodolale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rupatojuko/56683785562.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/woneduxakubavef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558c3281-c590-4fe6-bf5a-6c9262de45d4/bee_gees_top_songs_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1ef3ff-fd31-4495-84b0-2d1a7ac70807/mimadedafifafik.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/angular_template_input_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/reading_worksheets_grade_4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13965 2972 bytes
SHA-256: db216172449f862b8dde07a1ae4465b1380633be226bb972194f8bb86fc18425
font_01_sfnt_off000143e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E9 5228 bytes
SHA-256: 5dcb185ad793d6a728b25a0e7489658f0368b3d8787838b951cd2ba3f8f3b29a
font_02_sfnt_off000155bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155BB 17200 bytes
SHA-256: 885481b908bd9417a81b46f89b2ef2e61e31f1e146e55ec4b6f464e33a48b5f7
font_03_sfnt_off00018a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A42 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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