Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a94b22c3ecd892…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 08:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c61376e5844b158831a2f4782471cf7d SHA-1: 87b4fdb74110557c8302ad6aab62426ad13390f1 SHA-256: 62a94b22c3ecd892570e294307b11e37322f99a4f882cbb138cd5c58ad20c3cb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, with one pointing to 'seumenha.ru', which is likely part of a link farm or phishing operation. The PDF's structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, possibly for SEO manipulation 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=world+series+of+poker+mod+apk+2019 PDF link annotation
    • http://tevfikyuce.xyz/shooting_an_elephant_summary_themenoeax.pdfIn PDF document text
    • http://kenuzerelo.22web.org/furniture_assembly_instructions.pdfIn PDF document text
    • http://setlyb.online/asus_z97a_motherboard_specss605o.pdfIn PDF document text
    • https://cdn.sqhk.co/ruperodu/uPcjj5D/easy_thai_red_curry_tofu.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/j6he3ge/dixujuza.pdfIn PDF document text
    • http://jezetufo.iblogger.org/arihant_integral_calculus_book.pdfIn PDF document text
    • http://ueuniti.xyz/rufezopodisejekifogezez27w2a.pdfIn PDF document text
    • http://1green.space/12586101932uj07o.pdfIn PDF document text
    • http://byt-upak.ru/midsegments_of_trianglesf58on.pdfIn PDF document text
    • http://yoptan.space/toddler_poncho_patterne3m7g.pdfIn PDF document text
    • https://cdn.sqhk.co/wixikinotu/b2I2jjI/75828827597.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/5407e005-02d6-49c9-90f3-97c0609f2fcb/fuzikim.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/46837578877.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/belgian_malinois_training.pdfIn PDF document text
    • http://jewuvebasabam.rf.gd/beacher_hall_cqc_report.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/fender_passport_150_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2db07b-621b-4244-bffc-8f67467cb0a7/the_left_hand_of_darkness_summary_sparknotes.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_off0000eb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB01 5744 bytes
SHA-256: 8b3623c126c7a3c17c259c6fa7c4da97dbccc0b991960883618ad7c18f86ba70
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 10568 bytes
SHA-256: ff50f83506c202d475d9d4d58eb4bf78d2686b5591cd7d809c12baf70ac23c6d

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