Malicious PDF — malware analysis report

Static analysis result for SHA-256 690e5da99f84b2ac…

MALICIOUS

PDF

79.7 KB Created: 2021-03-18 14:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68dc73d6b02854e137a639cc032846d1 SHA-1: 728417d6d92f1e31d0c621deea8a3879d41c1b9d SHA-256: 690e5da99f84b2ac88f731b67272a73f1249722a31c56c65d765177d566b1067
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 0.9993

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://crophysi.ru/wix?keyword=intimate+connections+pdf PDF link annotation
    • http://tomolijoponix.mypressonline.com/suwokotuzeg.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/ipg_carmaker_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/jdMjcci/miviled.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/vilelumovanigidepe.pdfIn PDF document text
    • http://umkatrade.ru/806344433386sg2d.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/how_to_understand_integral_calculus.pdfIn PDF document text
    • https://cdn.sqhk.co/vepanoxubere/b8ehaO7/signal_private_messenger_for_android_4._1.pdfIn PDF document text
    • http://kpupnov.pro/woderik67v.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/how_to_factory_reset_samsung_air_conditioner.pdfIn PDF document text
    • http://pakekoramiduwin.getenjoyment.net/16879694252.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/FjhhcqM/nedigagupufo.pdfIn PDF document text
    • http://pejofewetoz.22web.org/how_to_do_dealer_business_in_india.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/27113299983.pdfIn PDF document text
    • http://diseguj.22web.org/what_does_combining_like_terms_mean.pdfIn PDF document text
    • http://gufutaca1.xyz/chalte_chalte_full_movie_filmyzillamx95w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ce1972-17a6-4306-88ab-3b0cf4c4c0ed/96705482029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cade510-28c1-4099-bd4a-b4d05c647ccd/blood_bowl_2_legendary_edition_ps4_gameplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e49ff8d-f3ab-4167-be65-aeffeec37079/lilaweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b957f26-5d47-4d7f-9fea-9b88a2482cf0/screenwriters_bible_free_download.pdfIn PDF document text
    • http://dajijebet.epizy.com/logical_fallacies_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c156b4d7-8e1c-4a22-b83e-c8b554c6aa54/53992039113.pdfIn PDF document text
    • http://wudafozejuniv.rf.gd/blockman_go_hack_unlimited_money.pdfIn PDF document text
    • http://tipatanakuke.onlinewebshop.net/59401731930.pdfIn PDF document text
    • http://nogafojomor.onlinewebshop.net/book_of_amun_ra.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/razoluxerudiwas.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_off0000f927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF927 5108 bytes
SHA-256: da9b57898b9877b4422fac99114a2cc215eb1f3625ac6e7e739164dfb1922e4d
font_01_sfnt_off00010a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A77 11384 bytes
SHA-256: c5dc5c5f78e488d8824e07a3b48d945e4540ee300c203953c94fae31f4126e2a