Malicious PDF — malware analysis report

Static analysis result for SHA-256 8860b954732a7153…

MALICIOUS

PDF

71.5 KB Created: 2021-04-12 18:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: b09a14610d5b2d1769dc7ac416d08d37 SHA-1: 5d351f3565932977b886101017b34661b2df8a25 SHA-256: 8860b954732a7153f85b2eebf92d2b865e8bc4963f915e13a04b5c8c0fff3314
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'wireless enrollment', likely to trick users into visiting a malicious URL. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=dsc+rfk5501+wireless+enrollment PDF link annotation
    • http://groshyk.site/63413923168rmgfs.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/j2iggiy/nipadoxuwaluso.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/ifkHhg2/online_radio_box_apk_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/dPseij7/afjet_afyonspor_forma_renkleri.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/the_universe_has_you_quotes.pdfIn PDF document text
    • http://sallles.ru/mawiwavexipiwejopupolewtjydq.pdfIn PDF document text
    • https://cdn.sqhk.co/kirinitaxuk/aUw9ZYc/metal_slug_2_apk_2020.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/35962838036.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/fqSgchi/poxikopagejusetefob.pdfIn PDF document text
    • http://pakizimavom.scienceontheweb.net/capital_humano_becker.pdfIn PDF document text
    • http://zafenoro.scienceontheweb.net/25_common_characteristics_of_successful_entrepreneurs.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/32429499294.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/gedotigakulewotasemir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/tepew.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_6343ea8b968a4360b06eef8a1c9ae5d6.pdf?index=trueIn PDF document text
    • http://kebenubes.onlinewebshop.net/nanegulilud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2337e8d-ded4-4e2b-b18c-e6498bbd81bd/warupexural.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/where_to_buy_sole_e25_elliptical_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85011c82-10f8-45e0-8c04-fbe1bf39a646/71131322543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefb578a-99db-4533-a259-366303dff823/sidula.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_590c69dd48884463a2153e484da18346.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_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 5288 bytes
SHA-256: 09a30531ef9c88ee3607396a2dc3c29b5e366c99a6f7d18436f31f44591b36e3
font_01_sfnt_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 11256 bytes
SHA-256: 7439433909e872e13b78abb5c07afc3079d614bd8d4e540606e67c7f72f54d8f

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