Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3ab3d6257515ea…

MALICIOUS

PDF

73.2 KB Created: 2021-03-26 12:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e3e91e5c78d7cfab56212e8253e1143 SHA-1: 97a23ac551ab79f344b1f6deb88ded486a9bd17c SHA-256: 4c3ab3d6257515ea2971f216be57fc46eb6731dc87f16d2e961e806dea9343c9
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 0.9998

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://jacksth.ru/123?utm_term=map+parkour+minecraft+pe+android PDF link annotation
    • https://cdn.sqhk.co/zoluxoni/6pT6cjd/bunny_boots_canada_amazon.pdfIn PDF document text
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/sogaluselive-bexubawo-mosamilakomex.pdfIn PDF document text
    • http://sis-paypal.com/81643456555ls3vm.pdfIn PDF document text
    • http://tesar-krd.ru/audacity_tutorial_for_beginners_in_hindidqz3d.pdfIn PDF document text
    • http://garant-ritual.online/zumuvekenekomuvoxedaxq8huz.pdfIn PDF document text
    • http://winoorama.space/gobupatubzcfgy.pdfIn PDF document text
    • http://noxokolozoj.iblogger.org/gorumekakakipad.pdfIn PDF document text
    • https://cdn.sqhk.co/migawudewiw/gcTUsha/gufuxusasitixajafazuzivor.pdfIn PDF document text
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/9540954.pdfIn PDF document text
    • http://mnclassis.org/9585612266409m39.pdfIn PDF document text
    • https://mawebexakonu.weebly.com/uploads/1/3/4/3/134390129/d93e8ed3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_88c2e517e8d14c6ab5f7df76b415bc57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cafa48c-6d2e-4ea3-bf98-9f916fd5ab3c/dodonafoxirafaguzi.pdfIn PDF document text
    • http://rufabojeta.epizy.com/how_to_calculate_salary_based_on_inflation.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_ede1db9b7c104be0b1370cf2d3c8e63b.pdf?index=trueIn PDF document text
    • http://pidulejos.epizy.com/74177833672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b171c0-ac58-4206-a154-293764919f25/how_to_read_the_wiring_diagrams.pdfIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_1323d93031264cb78239a18c61ab2d05.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
    • 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_off0000c94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94C 5160 bytes
SHA-256: 68c7fada60392c919c3b634430639873300da7f1e45ef7ab330af40285860573
font_01_sfnt_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 11412 bytes
SHA-256: b5309d3d0fe9e1020a2d470239f41afcd473dedc92d5c7b2ee7c9d714f03ca8d
font_02_sfnt_off000100d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 16192 bytes
SHA-256: eb29371a9263d1efed02b1533fb53138ee823a98fbd078e52407dfdd24d7a728

Open this report in the interactive analyzer, or submit your own file for analysis.