Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94abfffaad5b432…

MALICIOUS

PDF

87.9 KB Created: 2021-01-06 13:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f715f790efd82a799188803254837b5a SHA-1: ba69c7f22df35043ea3f54357d5137ea063d6293 SHA-256: e94abfffaad5b432bfb6ac7c5af393933dd128a0a511105682efc4c5d01cb5c0
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a phishing or link-farming scheme designed to redirect users to potentially harmful sites.

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://gettraff.ru/aws?utm_term=eu+dmf+guideline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5faf0dd000846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403673/normal_5f97cc5b7c0d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5feb8e5e947e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5fe34ac55d1df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f93abb42d0e6.pdfIn PDF document text
    • https://vukivogo.weebly.com/uploads/1/3/5/3/135329669/914aa3ebf.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/dhijcQp/download_apk_toy_race_3d.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/460a4.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/AhiiUxZ/epic_card_game_deck_box.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/27ffe761-dfe6-4276-aeea-c34565f4eb70/42609015831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15706ef-d21a-4c92-b180-71bc5d4805fe/the_alchemist_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6497f8-5a1a-44f7-baf1-11e1a191e687/kanye_west_good_life_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74f0d21-7538-488a-8841-e1b772816516/zarixofawozisiman.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_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 4700 bytes
SHA-256: 150bf97f3c422a5968f17078c5cc7593b87b1488dcdee8e49182f14e9cc24e9a
font_01_sfnt_off00012e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E16 10796 bytes
SHA-256: dc3ff9308d054d8b9acd3772224cc3366cc47c7fca73509bf8b8c438373b61ca

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