Malicious PDF — malware analysis report

Static analysis result for SHA-256 d392902deb5e99e8…

MALICIOUS

PDF

77.6 KB Created: 2021-03-20 13:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0c7d826d45057d81f2bb402c6c405cd SHA-1: 864a32de1715f6475c15cd21e96da3f8e6bffad3 SHA-256: d392902deb5e99e82fe55e75eb1581202e330118832bd63287843d48cbdfc211
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9960

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://botokaw.ru/strik?utm_term=how+much+is+a+rebuilt+transmission+cost PDF link annotation
    • https://cdn.sqhk.co/liralimujote/hheOb8K/subject_pronouns_and_the_verb_ser_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/eQghrig/72720585895.pdfIn PDF document text
    • http://myluckybet.xyz/payday_2_infamy_leveling_guidetrd6f.pdfIn PDF document text
    • http://metalllift.ru/zeboxajijefolirotupe5nusg.pdfIn PDF document text
    • https://cdn.sqhk.co/xumefugafa/AhgSGH6/83653716893.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/icJogcH/craftmaster_custom_pools_west_palm.pdfIn PDF document text
    • http://findfreegirl.com/duporamz2ct.pdfIn PDF document text
    • http://d-youtube.com/kowajemajupupuytfbg.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/is_smart_board_software_free.pdfIn PDF document text
    • http://jisuvakuwiraza.medianewsonline.com/92882700693.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/660_bus_timetable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5ff8c31b97ee5.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/bjcidja/maxis_match_cc_hair_toddler.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/rimij.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/introduction_to_aircraft_aeroelasticity_and_loads.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fcf92d2a135a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473971/normal_60496a0b6ccdf.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/84580821637.pdfIn PDF document text
    • http://vash-komfort5.ru/32587835972tzvpc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_8ec70ddd59a74e49be6336cb271cba63.pdf?index=trueIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_8b145b096f2e4d5b9560689401c3a9c5.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_38e217c7644545f68693f883a98603b0.pdf?index=trueIn PDF document text
    • http://teropisarazo.myartsonline.com/80539632405.pdfIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_8e0f08380ff448528032331de4d4545c.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_0856a87ec65f4cabbda948abd0c693ac.pdf?index=trueIn PDF document text
    • http://magegefopo.atwebpages.com/75791081550.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5232 bytes
SHA-256: 42696d40964be9178de725631640167ad890e98e781bd50e3a7de7aa3a8b3a3b
font_01_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 11292 bytes
SHA-256: 5514a0743f74b4bbc0c26b502f88aa7ec2c84ff39bb307c8444d2a2ce2305b19

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