Malicious PDF — malware analysis report

Static analysis result for SHA-256 e669f959f9e906a7…

MALICIOUS

PDF

74.0 KB Created: 2021-01-04 01:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 63b804b57765d012af13f21f11e646ca SHA-1: eae62b81e69f98a4146028b3277b8358b5c24fd2 SHA-256: e669f959f9e906a772fda3db3aea7f34c2baf7a3ca4e446ed229f406dfbb4e97
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to redirector infrastructure, indicating a link farm designed to lead users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to potentially harmful content.

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://traffmen.ru/aws?utm_term=bakasana+information+in+marathi In PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/fulito-moromub-ketilodor.pdfIn PDF document text
    • https://cdn.sqhk.co/vatepasoxi/hipS5t7/find_words_moving_crossword_puzzle_functions.pdfIn PDF document text
    • https://cdn.sqhk.co/wedegetuso/igjfijA/87076728128.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/5260429.pdfIn PDF document text
    • https://cdn.sqhk.co/litepepiwed/UibjjXT/adventure_academy_free_code_school_7771.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/jjrQ5hO/50572312096.pdfIn PDF document text
    • https://cdn.sqhk.co/xinovupu/uMG2Bhd/travel_bucket_list_notebook.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/getijmn/blaze_and_the_monster_machines_party_decor_ideas.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://uploads.strikinglycdn.com/files/3c3353f5-5dc4-450c-a757-056b8cb739c5/tuwewozenule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd820071-8c2d-40aa-9bb1-48b6f4f9b409/subject_verb_agreement_intermediate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf462e3b-c2dd-471e-84bf-dffb4666bdb1/juvedegedonuxazeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f05f25f-9d8b-4f03-8508-1dc00b674d2c/8920643240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f353cef-ae66-4624-950e-660b34e509cd/laporukurubexepixabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76d60c2-6236-4cf1-8ede-d3c67750b6f3/jarabe_torote_prieto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69293523-fe23-4f8f-acb1-ea79db3298ef/shootout_at_wadala_full_movie_watch.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA04 4760 bytes
SHA-256: 41fb6dfa9eed7b46e73c7415e303b989160ab32bbd6632c1ede95e414cc03348
font_01_sfnt_off0000e9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EC 10592 bytes
SHA-256: 3fa4aba5e935f4d56b8208f95ce4270c16e390270efb91d819a40d2c70d396f9
font_02_sfnt_off00010d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D08 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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