Malicious PDF — malware analysis report

Static analysis result for SHA-256 b363c45d1e065e72…

MALICIOUS

PDF

71.2 KB Created: 2021-03-17 08:26:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce38aebd5514c4a05408c72679766a63 SHA-1: 9140c1819ebb13f6ada3a76688919872d5ec382a SHA-256: b363c45d1e065e72ab7dd16311b46401a65de9be196f7fe83fc4a9b6a100bb2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=cyberpower+ups+will+not+turn+on PDF link annotation
    • http://tijukilebag.getenjoyment.net/11709179254.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/43924370642.pdfIn PDF document text
    • http://dapunajav.22web.org/83927034974.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/JMigYif/22272150229.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/i1gfmhe/mewiwuravujugofobemojunuz.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/maze_runner_2_full_movie_online_free.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/stephenie_meyer_earnings.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/uwCFKid/46543253188.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_d81d004dad69447fb4b7c5f7fc7d058a.pdf?index=trueIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_7a5252349fe0455f95bbbe40ff72841d.pdf?index=trueIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_9762d1f597144f5bb055c21d111f3890.pdf?index=trueIn PDF document text
    • http://pogitijerilux.epizy.com/eraser_apk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/can_access_internet_from_mobile_hotspot.pdfIn PDF document text
    • http://zagopemolal.rf.gd/zumokole.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/sido_bilder_im_kopf_free.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_a800fdd8b5d645f181aa153a96b2f9ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taguxif/dom_quixote_miguel_de_cervantes.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/how_to_rid_of_a_pimple_under_the_skin.pdfIn PDF document text
    • http://zesosugukazake.epizy.com/89346773174.pdfIn PDF document text
    • http://vomalowo.epizy.com/alesis_3630_compressor_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/sonochemical_synthesis_of_nanoparticles.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_46e5959a7ac2453b809ef421360c9cca.pdf?index=trueIn 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_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 4844 bytes
SHA-256: 97c32ddd07352674af008b422aceb3215e7ef0c721d6433fb272aa99d97e4c1a
font_01_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10444 bytes
SHA-256: 011d06b391c6e83b7e2a00fae2120b3ff3bb063100571319e8c32baac8dbb150

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