Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ec2456a61b8854…

MALICIOUS

PDF

75.2 KB Created: 2021-02-27 08:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8831d14111a4056c7fbe00931e402c56 SHA-1: d0d7915563c869f81af39d75df5338a01b174a03 SHA-256: f4ec2456a61b8854d28d0469676cb2e0800788bc139ecac8eb2376c4cf31cbb3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to attract traffic. The primary URL, 'https://midufefew.ru/award?keyword=vw+09g+transmission+valve+body+for+sale', suggests a lure related to automotive parts. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://midufefew.ru/award?keyword=vw+09g+transmission+valve+body+for+sale PDF link annotation
    • http://doctorzlo.com/togujidegalisuj5y9gq.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/how_to_get_share_the_wealth_cards_in_life.pdfIn PDF document text
    • http://neyroskakalka.site/78559742389tswd3.pdfIn PDF document text
    • http://fabermanufacture.ru/que_es_el_minimalismoo8jwl.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/fagopibi.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/d669f689d7bf.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/diary_of_a_wimpy_kid_2020_new_book.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/zuwefazog.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/the_youngest_doll_summary_sparknotes.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/25a5425fcbcb.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/31680530051ccfd.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/love_and_respect_conference_michigan.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/momuzukitefelo.pdfIn PDF document text
    • http://my-favshop.online/dubai_opera_guided_tourfcjq6.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
    • https://s3.amazonaws.com/fejatepudopito/anonytun_pro_apk_juli_2018.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/62282730782.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/convective_heat_and_mass_transfer_3rd_edition_solution_manual.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/relaxevibakijelepax.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_off0000d9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 5672 bytes
SHA-256: 5ba592f6da53e4aeca0d1f9eba69ad9abf3af94f53a254943f49f1d580d8fea7
font_01_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 10664 bytes
SHA-256: 51dda7ff95614d81294067c21120315b6f1cdf6a00e11fc443a197462e8f259a
font_02_sfnt_off00011182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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