Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a9c34a12f42d5ff…

MALICIOUS

PDF

74.9 KB Created: 2021-05-16 10:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bcb387163fb0eee968f0c026dafde00c SHA-1: 57be9153e8f50c3a75fbff4a992118e58a80b2d4 SHA-256: 5a9c34a12f42d5ff1dad6f48156f917a415c57b020e8308ec6febfdde93e0199
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 0.9990

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://golowaki.ru/strik?utm_term=honda+gx160+5.5+pressure+washer+manual PDF link annotation
    • https://cdn.sqhk.co/fesoxuleri/ciejjKd/rolowadepigaju.pdfIn PDF document text
    • https://cdn.sqhk.co/teruzemoru/ih4O8ic/biblia_de_estudio_palabra_clave.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/cgcLJih/moto_actions_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/digwOha/reaper_pickaxe_redeem_code.pdfIn PDF document text
    • http://zapajewoda.22web.org/nuwinazajodu.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/hhgjXJr/3773380959.pdfIn PDF document text
    • http://kapuwapow.iblogger.org/mukezugaxozekuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/jbhjhfT/ralowolumupisuvezore.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/eihphdg/wilozedoluwaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/fHjaghF/83224508979.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/zuwimadaneb/criteria_for_judging_pageant_template.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/1078707811.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/palexo.pdfIn PDF document text
    • http://buzanone.epizy.com/77954047570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eb6990b-6eb9-4611-aeb2-a19ff5034e34/zefekarok.pdfIn PDF document text
    • http://lofuwokapowudug.rf.gd/nelusukelevowetaxadajem.pdfIn PDF document text
    • http://judomumofu.rf.gd/dunuzivumimaval.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/the_dolls_house_summary_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/bleach_brave_souls_orb_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/only_incidental_services_reported_on_this_claim.pdfIn PDF document text
    • http://minirulo.epizy.com/4760001256.pdfIn PDF document text
    • http://rewakagofeloze.rf.gd/25739668554.pdfIn PDF document text
    • http://rotitow.rf.gd/90783601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d1baa2-baa2-4691-a756-cc24044e40d6/tixotekivozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5a9843-88cb-4e30-a943-42b4921a7de5/verizon_lg_4g_lte_master_reset.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_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 6000 bytes
SHA-256: ffa41289afc77e8607c2cc70cbcf016d54c3c8857ed382d7f280fc8a7ac7625f
font_01_sfnt_off0000f843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 10808 bytes
SHA-256: 76f98d85e2529bf96cf988fa728b3d298652aa764d205b4bbc3b25e728a8aa4b

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