Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4277b642de0532…

MALICIOUS

PDF

74.5 KB Created: 2021-02-25 06:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cc588600c96a554542f3a8d83f7ed45f SHA-1: eb3505698af908ce6759b56d80c6751ee2afd16e SHA-256: ce4277b642de05326a8852960a692491d5efad7a93e20dedc12047df5ed521a2
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/123?utm_term=sword+art+online+progressive+light+novel+volume+6 PDF link annotation
    • https://cdn.sqhk.co/fukonovum/Zjjjlic/bird_sanctuary_close_to_me.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/gyheic3/amino_horror_games_arabic.pdfIn PDF document text
    • https://namunoxup.weebly.com/uploads/1/3/5/3/135339392/8857890.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/mi6REjb/download_game_tiny_space_program_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/hieijs9/keveluxewawabefikufeded.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/heiiKjU/30091919349.pdfIn PDF document text
    • https://cdn.sqhk.co/bodujemep/jjXXLij/capture_the_flag_movie_watch_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilagojusorevu.epizy.com/34043394281.pdfIn PDF document text
    • http://pewaxoxepizus.rf.gd/zosisabej.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/appreciation_letter_for_students.pdfIn PDF document text
    • http://xodubepegiluli.rf.gd/76252603433.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/6895003592.pdfIn PDF document text
    • http://burijudipo.epizy.com/ketovari.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/prepaid_expense_schedule_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/wefowirumapevatusi.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/93755912936.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/37200675283.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/girananugoxodej.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_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 3320 bytes
SHA-256: a5d003fdee63e20e95fc9199822a3559d0adb6b3fdc99bcb878a22b22f2dc89f
font_01_sfnt_off0000dc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 5784 bytes
SHA-256: dc1a5c1a1144ba820034f16c9da3be3b01187e1afb52eb1a968fd557a7f36839
font_02_sfnt_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 13664 bytes
SHA-256: b18eb3a59659f0a6bc24151dce2b89c80ec97de454ad27bdaa4f17eebe43d3e6

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