Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b069d6dd143720e…

MALICIOUS

PDF

68.0 KB Created: 2021-03-25 05:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc4217b4e9f98f7d6ee16988eb3f18b SHA-1: d1edc2fc16a26e3d89fe5f9aa2c999c6a37f78d8 SHA-256: 5b069d6dd143720ee0c1b8f9eeb157542e4fdd8ea11f1ed20e584ec6f272f706
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/04c489fe514f0ea.pdf'. The presence of the URL 'https://resalured.ru/wix?keyword=ty+stuffed+animals+with+big+eyes' in the document body suggests a lure to a malicious website. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=ty+stuffed+animals+with+big+eyes
    • https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/04c489fe514f0ea.pdf
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/xozexuwox-pipumi-zasemujena-biguwev.pdf
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/rumevosarixizar.pdf
    • https://cdn.sqhk.co/xufatirumina/Yjehagf/meena_game_download_for_pc.pdf
    • https://bokasaveti.weebly.com/uploads/1/3/4/7/134725866/fitovifoxalo-wasen-samezoworite-narukik.pdf
    • https://cdn.sqhk.co/vipatajase/awAgiTU/xibalar.pdf
    • http://gododerur.66ghz.com/resolving_ethical_dilemmas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/efb7e16e-e555-4c64-a3fa-02b9d726fcf0/can_you_make_banana_loaf_in_a_bread_maker.pdf
    • http://kufutajov.epizy.com/89285047822.pdf
    • https://uploads.strikinglycdn.com/files/ff7605c7-6502-4fef-8604-13f2c7778d7c/campbell_hausfeld_powerpal_air_compressor_price.pdf
    • https://uploads.strikinglycdn.com/files/570e242d-cff8-49bc-9615-fa1509a6daf5/2701424949.pdf
    • https://uploads.strikinglycdn.com/files/4355b7ab-5c82-4c0a-9283-3463e586f156/jujexamesoj.pdf
    • https://uploads.strikinglycdn.com/files/cd5d5aa4-0423-4954-8b02-4d56bde39dbf/timirenodaxipebopis.pdf
    • https://uploads.strikinglycdn.com/files/8fffb5c0-cb8b-4b3a-983a-b4ce3ff84aeb/the_bitcoin_standard_audiobook_free_download.pdf
    • https://uploads.strikinglycdn.com/files/2d4b62e7-9478-4d08-87ba-197f64cdea57/what_does_bbg_stand_for_kayla_itsines.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a1.bin
cb7c547fa70b2f73a1fba037679e32cf9ea81f47f4bf732a84f73c61487e30ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 5508 bytes
font_01_sfnt_off0000e357.bin
d6be2db69022a05246d99a75ccaddb1bcae6a5a054bfc1a2470e5bde41808a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE357 9616 bytes

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