Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d297d6a70d7fe31…

MALICIOUS

PDF

67.7 KB Created: 2021-03-17 03:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8e5c1d39f855f7a81a4c4eab8c729f14 SHA-1: 6a27c671032f832fb3ae98ae727d9073b2696236 SHA-256: 2d297d6a70d7fe31e925aee4095366e690f660feb90a795160bd2262183da473
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable hosting, which is characteristic of phishing or link-farming operations. The document body, though heavily obfuscated, suggests a lure related to children's educational materials, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=english+alphabet+for+children+printable+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375908/normal_602f93d2a6ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_60206f8ab97ee.pdfIn PDF document text
    • http://shoplus.info/bus_simulator_games_apk_freenpida.pdfIn PDF document text
    • http://rimka.xyz/billiard_game_free_setup4dry2.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/gagokemanedibo.pdfIn PDF document text
    • http://vitrinachel.ru/xenanasololakojemavavo59rtr.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/what_is_the_most_common_microvascular_complication_of_uncontrolled_diabetes.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/jagujedejigaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6024128851452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipazafar.atwebpages.com/agenda_2020_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/fiwujumarixuza.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/71613214168.pdfIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_1dc9bdf6126d420aad44c41f0202c23e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/75860451865.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_d9673b49deba4db1946f570332291c53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/can_bank_open_my_safety_deposit_box.pdfIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_6a38db514da344abb588801a8a8aad6e.pdf?index=trueIn 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_off0000ccd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD8 5512 bytes
SHA-256: 8eef40209467108bd13368c067825282e9a377b81a367beff8d926e1faaee64d
font_01_sfnt_off0000df8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8A 9880 bytes
SHA-256: 0ce708df9b539ecba2d039a1d8ca5df172e845be821cbb20233cd1baf9915d77

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