Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddabb5cce8748c7…

MALICIOUS

PDF

94.6 KB Created: 2021-04-26 14:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8d38e8c41eb81952f3867327d7ed8a5e SHA-1: 8ee6a2e88a6f7de947613eafccce36ea99240a38 SHA-256: 6ddabb5cce8748c7c84e174af1219dd3ce3451cef2b79f6aba4838b12a70ec43
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=marxist+political+economy+definition PDF link annotation
    • https://cdn.sqhk.co/nuvuvidova/ezhN2gd/bright_sina_video_download_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/wanowofimaz/epWtgdi/bikidisulozarevizopuno.pdfIn PDF document text
    • http://vifofumimugeke.22web.org/pover.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/fidqjex/fafudipobivodekebinuzej.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/qNlrie9/lowigilokobuzizopukes.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/jkjjjh6/nowhere_to_land_movie_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/A9vicMp/learn_50_languages_apk_download.pdfIn PDF document text
    • http://winepazijabubov.22web.org/48984070272.pdfIn PDF document text
    • https://cdn.sqhk.co/tirazirevemu/DCigVYk/37970511764.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/gcjfiiV/babisajomixuxetugukulore.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_b839e01f38564c299dd8ceab6c674af7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28169efb-ed55-40d0-849d-9eab5748c8ea/22846488294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14985e76-f9b4-494a-9324-13d964a74607/no_fear_shakespeare_julius_caesar_act_4.pdfIn PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_290f25a6909041059607158e5a67d583.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b8a1fb-bb29-42c8-851c-4d04646632fb/canon_eos_t5i_charger.pdfIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_75e2925781c9487aa218af5ae239f641.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d40d5d-c3d7-4ffa-b8f3-a6a1309d5d32/tipos_de_comunicacion_masiva_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d854ff78-9e3f-4515-a469-edb268874eec/jbl_flip_5_portable_waterproof_bluetooth_speaker_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a624783-6fe4-4a1b-b1fa-2f5b9e306283/87647474531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6fdaf6-fd78-4c08-a8b7-deca4a8616e4/namimujilame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b58d8ac-4ac4-4e31-bf74-94f15519a50d/43836062526.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_off0001359e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359E 5476 bytes
SHA-256: 3316af37024c97ab5728331ba7df5fcbb76675cc8d64237196473f14c96655e3
font_01_sfnt_off00014844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14844 11160 bytes
SHA-256: 0ca92994c4a13c434a2845a78513c100b75a057bcc02572ccbfbd084b746c1a2

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