Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5bc5cb61ea4c70…

MALICIOUS

PDF

75.6 KB Created: 2021-04-09 00:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f579b704b8d693109ab76c2636c24a39 SHA-1: 42c46842afb606c28c6407562e1281e872a5b5e9 SHA-256: fe5bc5cb61ea4c70457e4913230b933c8e58aa942e228e4600c6fe462f1468a4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with a primary focus on 'https://druttle.ru/strik?utm_term=how+to+set+up+my+magellan+gps', suggesting a phishing or redirection attempt. The PDF also functions as a link farm on disposable hosting, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=how+to+set+up+my+magellan+gps PDF link annotation
    • http://maykistore.ru/common_behavioral_interview_questions_software_engineer0fi1l.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/fhijclv/khan_academy_4th_grade_math_decimals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_60125fb846b41.pdfIn PDF document text
    • https://cdn.sqhk.co/pananele/jfpidjj/batexulanepe.pdfIn PDF document text
    • http://triple-doska1.club/sofokles_antigona_slovensky8a0xd.pdfIn PDF document text
    • http://yildirimotobursa.com/ansible_interview_questions_and_answers_for_devopsudshd.pdfIn PDF document text
    • http://counterman.ru/52760749796c767c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_60610c62c0ab3.pdfIn PDF document text
    • https://cdn.sqhk.co/pifitudebuxo/igAiidW/piano_tiles_2_apkpure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tosego/gubobegivari.pdfIn PDF document text
    • http://vopimivukaf.epizy.com/calculus_early_transcendentals_7th_edition_yonsei_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc0c820-59d5-4783-99e4-2085c3fab9a0/what_were_the_3_estates_in_france.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbc53e46-ce70-498a-8cd7-a1df07517b01/rufatodaxagem.pdfIn PDF document text
    • http://bidilud.rf.gd/calendar_2020_november_printable.pdfIn PDF document text
    • http://tutalagu.rf.gd/zerowudamijasijuseked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68319437-abf4-48a8-93c4-3441a74777d0/91449229467.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/muzogezugerakiburajonul.pdfIn PDF document text
    • http://nefijojutofad.rf.gd/capitulo_1a_actividad_8_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/90553367728.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/90345291746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60558ff-b4cb-4d35-b6b6-92a4e80fe57e/wenatotomimasipe.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_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 5200 bytes
SHA-256: 9bfa6fc0883cf66f60d116b94ec85cfb1e4fb5478876a64eee98f54ceaef0369
font_01_sfnt_off0000fa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 11408 bytes
SHA-256: acecc0be24a805d91a71e7c6e3356fe64219d8611e0322b85d8a5f6edf704213

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