Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c884bf46d573f7…

MALICIOUS

PDF

67.8 KB Created: 2021-03-02 18:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c6a70b761a59830032722add7988ce1a SHA-1: e1eda507dcd05e465051a7b01ad3dc243b552b6c SHA-256: e4c884bf46d573f7d726aa5541d4c157e90faf31133c0f69702ec1b6acbcaff8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to potentially harmful websites.

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://maypoin.ru/award?keyword=how+to+update+golf+buddy+tour PDF link annotation
    • http://loxigedu.iblogger.org/title_page_mla_template.pdfIn PDF document text
    • http://kittyplay.online/shop_rental_agreement_format_in_tamillnbuy.pdfIn PDF document text
    • http://classkaod.ru/puxogaraz3nkno.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/baal_veer_movie_videoc6afh.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/WNlihsG/highest_rated_imdb_movies_on_amazon_prime_2019.pdfIn PDF document text
    • http://arendagg.xyz/ram_dass_film_trailer5hjhh.pdfIn PDF document text
    • http://tezubimisigej.iblogger.org/femivexupubotusevo.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/f6ig9hc/91747943479.pdfIn PDF document text
    • http://thiswaytovogue.com/85033127061zkx56.pdfIn PDF document text
    • http://usecabinets.xyz/how_to_turn_a_picture_into_a_painting_photoshop6mgkj.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/86755288878rfzkl.pdfIn PDF document text
    • http://technodom11.com/55212074129mpnxm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490376/normal_5fd1745638c92.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/3igidhh/megokotumuwesimobexon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodegopoxomo.epizy.com/lolepepepajufonikora.pdfIn PDF document text
    • http://razafif.epizy.com/how_to_play_barre_chord_on_the_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/33809022655.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/67199212921.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/gememawoxivugivuzinuridof.pdfIn PDF document text
    • http://rupokabimizoju.rf.gd/vasopamupapekeri.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_off0000ce37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE37 5328 bytes
SHA-256: 31d52f8baeb58c83d30ad399d44350d8409db7412867b7ce304e629e76580182
font_01_sfnt_off0000e07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 9892 bytes
SHA-256: ba3f709fb797c2dca22bd78cc6803eef4c6ce29be421b6e392876220f94ca73b

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