Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16be00f9e5bfdb4…

MALICIOUS

PDF

72.0 KB Created: 2021-01-03 12:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9ac3c6f2a40fc9572d1496d0b6c4dcb3 SHA-1: 2391e919b4ede12922dfdaf534ce639ce2dd451e SHA-256: a16be00f9e5bfdb45501429dfb719c7788d796ce14bf590742295304e7d74c6e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'traffmen.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised or malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/aws?utm_term=org.+apache.+commons.+lang+jar++maven In PDF document text
    • https://cdn.sqhk.co/muxigatatini/2jblQhh/vermeer_mobile_tipps_und_tricks.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/1e594bde-8840-4dda-a4c7-30eb75e84176/harry_potter_clue_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/penekalurelovamef.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/how_to_draw_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7370ecd-c614-4244-925a-4adb2df7854f/62294872457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d9ab78-52b9-4c06-b6c9-af94a040faa6/32695372377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38d23e2-5159-405f-95b4-083b766add3e/consideraciones_generales_de_la_etic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43e2550-3bb7-47b0-823b-a13eb34471ae/jefuxuvipidipez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bafbbc-5294-4b36-9376-f3c9b0a54650/dekunufupopajevulemegaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24277f7-fab6-4666-8cef-fe2411be0b34/94089745845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecb08e7-0a90-40f4-8b08-cb1844c3f71a/lifibosunotod.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/bow_master_mod_apk_free_shopping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b841be-9443-476d-a05f-c1efe820fa35/kobefexemapaguzoraxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c63278-1d47-4f24-b715-e0cc4ad1f7a2/39802563673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b7353e-3921-4455-b567-761c1486473f/ch_8_an_introduction_to_metabolism_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd60584a-4d18-40fa-8434-daa30caec64e/dujobikepigofamikipo.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_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 5544 bytes
SHA-256: c544c24e802b4e675e0d59f74b4b72f019275c9987423c5cf163cddef3932d6c
font_01_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 11528 bytes
SHA-256: 5584fc5b247c28a272ad09b99a53082e34c52e297e663619e6efdf614902ff8b

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