Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd0468cb0c7647c…

MALICIOUS

PDF

74.9 KB Created: 2021-02-03 21:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 28caba14c8bd30a2972406f4b9583d8d SHA-1: 06e0b244b3622babb6369528723ad58383b6d4c0 SHA-256: acd0468cb0c7647c9dd69ba78eb8559d7a53c42adabf6e565b884c99942bb062
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to reference "Tire rack street survival reviews", suggesting a lure to disguise the malicious intent. The presence of many external URIs and the link farm heuristic indicate a strong likelihood of 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 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://jottigo.ru/123?utm_term=tire+rack+street+survival+reviews PDF link annotation
    • https://cdn.sqhk.co/xumifutave/if5ibfi/kuwonogakuxebikokumiv.pdfIn PDF document text
    • http://svoytrylend.xyz/race_car_driver_killed_by_flying_tirevt7yx.pdfIn PDF document text
    • http://myimperfectmomlife.com/racing_simulator_cockpit_for_sale_brisbanevzrg0.pdfIn PDF document text
    • http://lusoxokurutugap.22web.org/82362030926.pdfIn PDF document text
    • http://probnik1313.tech/flying_monkey_jeans_wholesale2601x.pdfIn PDF document text
    • http://mini-cam-v2.club/10225962143h1zmv.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/BWYjeJV/verizon_cloud_pictures_to_computer.pdfIn PDF document text
    • http://aycotoro5.xyz/932066718124aui.pdfIn PDF document text
    • http://outputqwvk.space/shark_navigator_vacuum_cleaner_owners_manualwdmft.pdfIn PDF document text
    • http://kostlike.site/nikabifubajupeolobp.pdfIn PDF document text
    • http://madamzero.com/guxufatoferonobexe99iv2.pdfIn PDF document text
    • http://presentinsta.online/tenncare_attestation_formuqa06.pdfIn PDF document text
    • http://premial.su/diwol6b8cj.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/eKficYE/andrew_walker_pac_12.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/91738878834vttgv.pdfIn PDF document text
    • http://itravelgr.com/school_teacher_simulatorvrqv9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muxenad.rf.gd/enfermedades_del_cultivo_de_arveja.pdfIn PDF document text
    • http://rebubokinore.epizy.com/bazumabifuwakeboriseri.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 4960 bytes
SHA-256: 7bbd02fb852e91a3244ecd0d5cce370ba34b831fd36930af9352c9b397b94ccf
font_01_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 10852 bytes
SHA-256: 28bf2c57ae037e5b72370d55e4a31e50f33fde7f4c8c87081873020dfa4c140b

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