Malicious PDF — malware analysis report

Static analysis result for SHA-256 5301cb69fb7219ba…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 16:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c02b0a9ccf00ce7a1e36053b6157f8bf SHA-1: f2cddb15e4a9a182e6f81d9d8644c24c3657797c SHA-256: 5301cb69fb7219baaadfe0e515fe80f2ca8c6e153b80df346ae2a7c00ee80f58
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious 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 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.
  • 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://yafferge.ru/123?utm_term=rendering+in+pen+and+ink+pdf In PDF document text
    • http://flash-sar.online/pulivisigiboruvipqarig.pdfIn PDF document text
    • https://jabikazisejifo.weebly.com/uploads/1/3/1/6/131606509/5700649.pdfIn PDF document text
    • http://zelopaqq.xyz/mini_band_exercisesgl8of.pdfIn PDF document text
    • http://umniashka.ru/jurassic_park_telltale_apkbrtfe.pdfIn PDF document text
    • http://tebizutumitus.22web.org/kala_patthar_movie_480p.pdfIn PDF document text
    • http://xifotole.iblogger.org/ppsspp_2018_games.pdfIn PDF document text
    • https://xuvitekopa.weebly.com/uploads/1/3/2/7/132712193/lujexurexekot-xipapiluxurifi-sofivonos-wupukidazogoro.pdfIn PDF document text
    • http://zarabatyivat.ru/amedd_army_mil_file_publich4hde.pdfIn PDF document text
    • http://mmeueue.space/pexolipavidevovafud9260x.pdfIn PDF document text
    • http://securityverifiedservices.com/aditya_birla_mutual_fund_address_change_form0cor3.pdfIn PDF document text
    • https://ruzikafa.weebly.com/uploads/1/3/0/7/130739156/f159b.pdfIn PDF document text
    • http://hushseo.online/information_security_analyst_job_description_and_salaryybg4x.pdfIn PDF document text
    • https://vinedenakebuz.weebly.com/uploads/1/3/6/0/136020142/6431068.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
    • http://binaraw.epizy.com/wowhead_warlock_bfa_guide.pdfIn PDF document text
    • http://jokilezitewoj.epizy.com/cryptic_quiz_answers_page_180.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_off0000d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD486 4668 bytes
SHA-256: e2e07a45e1c7917b577bfba2bf2afbcdf249f933f8403a106d8f55ec3009608a
font_01_sfnt_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 10176 bytes
SHA-256: 0fba7b9ba6eb22174eb4f4e1f61a57f8fb8daa0bd2f39b7fe4bcc6505968d66c
font_02_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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