Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b98d1f7d4277da9…

MALICIOUS

PDF

81.7 KB Created: 2021-03-27 19:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 10a0b7bd9da32583e4d0b2606ccbc47d SHA-1: 33e04cf84821cf12580225f2aacc055f443096ce SHA-256: 1b98d1f7d4277da91130b92536aadd38cb0fc03f6473a42ed1699f85560fa0bb
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://xajibur.ru/strik?utm_term=idiots+guide+to+buying+bitcoin PDF link annotation
    • http://puditutado.22web.org/malcolm_baldrige_modelo.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/kuzigirabuvukeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489609/normal_5fc69fa832818.pdfIn PDF document text
    • http://zimipamus.22web.org/where_she_went_book_kelly_simmons.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/pisinasam.pdfIn PDF document text
    • http://rabusasomel.22web.org/european_food_menu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fe947c1570da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_600f9d733a7b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_604175a7610a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5feec90c3c673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/afdf91f3-6cea-4467-92b7-fef2cf9b2828/75148475195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e572f79-412d-4ecf-9030-c8cf2316aa03/will_the_star_of_bethlehem_shine_on_december_21.pdfIn PDF document text
    • http://koxowasone.epizy.com/xujaxomususularibine.pdfIn PDF document text
    • http://rofizamomu.rf.gd/bunnings_chipboard_sheets.pdfIn PDF document text
    • http://nudobovedazopor.epizy.com/nedimezakotewirojaputudid.pdfIn PDF document text
    • http://fesizufutubejug.epizy.com/77958683850.pdfIn PDF document text
    • http://lemunewelow.epizy.com/89556078530.pdfIn PDF document text
    • http://palexibibiw.atwebpages.com/bexuposogorofunurolugig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbef4489-9961-40f7-8fcf-aac758c31171/how_to_use_elite_platinum_air_fryer.pdfIn PDF document text
    • http://rowomikaxanuga.rf.gd/diffuse_axonal_injury_grading.pdfIn PDF document text
    • http://wopidexojabin.rf.gd/nakojapamawugosimuzusi.pdfIn PDF document text
    • http://maligufaribez.epizy.com/36366624335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9bbf0e-48bb-4846-8b1a-b9b1713c1dc4/codex_astra_militarum_8th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468eeb84-3709-4da6-b1bf-51f6aafbf6a9/accu_chek_performa_manual_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 4828 bytes
SHA-256: 2b70a050f85b85c0cc7b3eb4f201e6f0e33cbe5ff8dfc9c31a09b8cd09764864
font_01_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 11132 bytes
SHA-256: 8915a9165679a75bc4849723f356b443c1c1886c180014ba341b852ab9c37e41
font_02_sfnt_off00012aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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