Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a186bc484278e5…

MALICIOUS

PDF

79.6 KB Created: 2021-04-23 04:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f6175c009d946a8f3e6e250a07dbeb24 SHA-1: 882539d8b41845a901fe84473b4356e0cd4d9f0f SHA-256: 86a186bc484278e507cbe1d13f45c1dc088fe27db101d7d9ca589eff4b5c27ef
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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 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.
  • 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://jottigo.ru/strik?utm_term=mtd+yard+machine+snow+blower+belts PDF link annotation
    • https://cdn.sqhk.co/fafojipedul/Iugggc4/rixenaxadufitun.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/MvG8dgd/15558465332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420612/normal_5fd07438c94d7.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/ret_pala_3.3.5_pve_guideet57v.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/ijc5N8C/actor_tycoon_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_600d0a5422cee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_6022e5fe189c9.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/bbjfmeP/kakatoboro.pdfIn PDF document text
    • http://kpovli.ru/gartner_magic_quadrant_cloud_cost_managementof31s.pdfIn PDF document text
    • https://cdn.sqhk.co/tokokoxisuf/ZjGifia/kukezelexote.pdfIn PDF document text
    • http://saveyoutubebot.com/theme_of_the_novel_a_fine_balance_by_rohinton_mistryw421l.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/fajujiju/moto_g_2nd_gen_sim_card_slot_price.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/zadipevuzox.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/17781875671.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_d911730de5da4f1fb9c2cf10de3e1374.pdf?index=trueIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_d8ff6e26ee7c4c42b62f18a9148fa437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/26744409186.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/large_catechism.pdfIn PDF document text
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_8855744bc3034b488fc3229827e4f42e.pdf?index=trueIn PDF document text
    • https://c335e157-9962-4e43-983a-f5fcf491c4e2.filesusr.com/ugd/a09b09_be11dcf5fdba46f6a906db778d840cf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/teramemusuvob.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/nujukixaxip.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_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 5516 bytes
SHA-256: 4e6ea7de2c60d0f5fc45b95ab8d0ba340d4d3a9c0d5389c5c550cfa1627ddcf5
font_01_sfnt_off00010adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADB 10644 bytes
SHA-256: 07440d496356495877052adcb3ccd2e8ed4405aa1cd8bef1a8d9b4ca19080572

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