Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b22270eed849f2c…

MALICIOUS

PDF

66.5 KB Created: 2020-11-20 03:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0646fbce1961e13afbc404cc318bd8fb SHA-1: 1e109c9b789376d4bd370ae2fba9f8f1c511f068 SHA-256: 1b22270eed849f2cedfbe4a66d25115b7bd2d3523274fb122952eed6a04e6e94
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://traffmen.ru/aws?utm_term=medical+fitness+certificate+format+free'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's designed for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=medical+fitness+certificate+format+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8acd426f-1227-446e-b7d2-8de17fec4fcb/bidobowe.pdf
    • https://uploads.strikinglycdn.com/files/c5e1c911-be87-48a2-85fa-4eb590a57d7e/34877955551.pdf
    • https://uploads.strikinglycdn.com/files/20e94d95-5045-4279-9fce-92e8a305a704/thinkorswim_thinkscript_manual.pdf
    • https://s3.amazonaws.com/zuguvoxoki/tesuxajija.pdf
    • https://uploads.strikinglycdn.com/files/1444a574-2d00-4028-9da2-ebe973ac53be/arrival_of_marie_de_medici_peter_paul_rubens.pdf
    • https://uploads.strikinglycdn.com/files/9e5f3872-8ede-466a-a7a0-5c6853cf5b99/zigikofuxujikawaxefujovab.pdf
    • https://s3.amazonaws.com/wusigipufuvowix/business_mathematics_13th_edition_answers.pdf
    • https://uploads.strikinglycdn.com/files/f1af0dfc-2fff-4ffd-a46a-95a741b70e7d/jifonori.pdf
    • https://s3.amazonaws.com/wivunonovef/22459086995.pdf
    • https://s3.amazonaws.com/jusagi/activator_office_2019.pdf
    • https://s3.amazonaws.com/vapite/29456301288.pdf
    • https://s3.amazonaws.com/gifiz/4e_artificer_guide.pdf
    • https://uploads.strikinglycdn.com/files/b51cd4bc-3b72-4ad9-8f0f-f426f9259ad7/bilovadiwerilemavaso.pdf
    • https://s3.amazonaws.com/bizamesuwepe/mamofemugivavo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c99a.bin
70af6a19a0967a931729279868155c22d6e17f8f3e2ec3e82206d76fe177fa5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC99A 5172 bytes
font_01_sfnt_off0000db2a.bin
e71b88b51edbbd8343470128f8d5ee1962d78a59728b6f65ef973f6e08d00ace
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 10028 bytes