Malicious PDF — malware analysis report

Static analysis result for SHA-256 2250fe59f279b285…

MALICIOUS

PDF

87.0 KB Created: 2021-03-09 04:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4023c06067064d15f13e7732910d1687 SHA-1: 9c89d4f5d86dff4bb201d1f389bb3307e807d824 SHA-256: 2250fe59f279b285a1fa85a3c0a863b4b10e2ef54e373fded727c7bfe429dfd6
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 0.9991

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://jacksth.ru/123?utm_term=bongo+mix+2018+audio PDF link annotation
    • http://bristol-yalta.run/machine_gun_preacher_2011_subtitles4qmub.pdfIn PDF document text
    • http://discovljzg.fun/vitubobobirezanaaipar.pdfIn PDF document text
    • http://neluvukod.22web.org/wisabisoxubub.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/mahindra_tractor_picture_download.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/eight_parts_of_speech_exercises.pdfIn PDF document text
    • https://tuziroxakitisa.weebly.com/uploads/1/3/4/6/134613497/bafame-mevuxowazejigij-zogixakogonos-foniwujonigako.pdfIn PDF document text
    • http://kino-vezde.ru/cms_h.264_dvr_client_software_downloadwqial.pdfIn PDF document text
    • http://indital.fun/23741472875wkevn.pdfIn PDF document text
    • https://kadorupadidugi.weebly.com/uploads/1/3/1/6/131636929/6533861.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/do_verizon_phones_work_with_straight_talk.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/lelotokujo.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/ford_4500_backhoe_parts_manual.pdfIn PDF document text
    • http://vagivosifogezer.22web.org/how_to_grow_lettuce_philippines.pdfIn PDF document text
    • http://phrensy.co/fixixe3pdx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/length_conversion_table.pdfIn PDF document text
    • http://kesolimasakifi.myartsonline.com/fevitik.pdfIn PDF document text
    • http://dipijiz.epizy.com/kojazigetodigeti.pdfIn PDF document text
    • http://minivenema.atwebpages.com/82071152499.pdfIn PDF document text
    • http://tunowik.epizy.com/voburodolidike.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/molar_absorptivity_of_metformin.pdfIn PDF document text
    • http://nozosikela.rf.gd/wagner_w100_wood_and_metal_paint_sprayer_reviews.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/89698925395.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/psat_practice_test_2_answers_fall_2018.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 5476 bytes
SHA-256: 378a36e1552f5d39ab8926fd5f6232e47a7d51af132bf5b67e1b4cbadcb03ee4
font_01_sfnt_off00010a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6E 10724 bytes
SHA-256: 066c571f21cb3a0aa35316601a1cfdef4f1db40f89cec80e18d8c2fd1503b19c
font_02_sfnt_off00012ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF5 18896 bytes
SHA-256: 68b148664a1c9264ad1c5c69d1fa8bc86907fa3c005a02435f6b4457739fe70d

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