Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3cbaadbff5ccf6…

MALICIOUS

PDF

84.1 KB Created: 2021-05-03 20:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 407b8038e49bd8ded61dfda3f71dd875 SHA-1: d775e34b3e839162d4c1087e73942183325fc4bf SHA-256: 9e3cbaadbff5ccf6d9b6eed66e03991041ee1124995c104dca8f706a8b78fcaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=ukulele+easy+chords+im+yours
    • http://xafesuvorolivig.scienceontheweb.net/jakutagatetumop.pdf
    • http://fuxezaboxekave.scienceontheweb.net/beatles_here_comes_the_sun_tab.pdf
    • http://nunopasatipimav.medianewsonline.com/45423697943.pdf
    • http://ruwemipuwev.mypressonline.com/yoga_mudra_benefits_in_hindi.pdf
    • http://jiteruruw.sportsontheweb.net/vatupusedurimuzevutan.pdf
    • http://worelimupuvefam.mywebcommunity.org/31850691106.pdf
    • http://mevukavotidu.getenjoyment.net/corrosion_of_stainless_steel.pdf
    • http://nitafibejuze.mygamesonline.org/basic_theological_terms.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f2fd44bc-e982-4dbf-8129-343f26a39f52/miraxubarobuxixu.pdf
    • https://uploads.strikinglycdn.com/files/46c53842-12f4-4865-aea0-593ff68424da/court_of_thorns_and_roses_book_2.pdf
    • https://uploads.strikinglycdn.com/files/aeacf3e5-d1c4-40fb-80bc-586819ef8f61/lajiwusavavobeb.pdf
    • https://e4dd5bf8-bd13-43e3-b37b-9624b2564f03.filesusr.com/ugd/093416_7a1a7ac025054513948a79da7d0f4fbe.pdf?index=true
    • http://sabiwilurase.atwebpages.com/92386616889.pdf
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_3f55e81b9b624064b252c1d854691d3a.pdf?index=true
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_c906b59b136649ec972123a61181013d.pdf?index=true
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_7972bcb50e4a4f6186d6601016f1fb8b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/71280a89-e04c-44a4-8eee-9d175c75ee2c/94540068811.pdf
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_9c52df2d66684531b597a9d5dd9b4e12.pdf?index=true
    • https://uploads.strikinglycdn.com/files/04adeeac-f93d-4879-b8dd-34ae61d368e8/can_you_convert_a_crib_to_toddler_bed.pdf
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_8bd81bfb07b14f5d92391bfe4c48b6b4.pdf?index=true
    • http://rosajeku.myartsonline.com/printable_calendar_year_2020.pdf
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_1ac85ad372c842279a2726d667c0834a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/441be945-d60f-4b14-93d2-1f058fb649e5/10382459313.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95b.bin
e1e25cdd2c7456b3968d4e13e10bbab76d31e417fb4bea104d27a3cb780552bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 5032 bytes
font_01_sfnt_off00010a74.bin
080043f0524bd0d1ce4f6232db554c498f65af3dcb5a158321dc4d5799eee96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 12432 bytes
font_02_sfnt_off000132e3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E3 4324 bytes

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