Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96c0424b14ecec0…

MALICIOUS

PDF

75.6 KB Created: 2021-02-24 06:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 09d09f65534b3e5808a245e727a91de5 SHA-1: b1e3e3f4997e9d55225b5a3774fc4319c005450f SHA-256: a96c0424b14ecec0ca84d82963f4190e437d12b05d4fe75f72487c48d95b0ffe
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links on potentially untrusted domains.

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 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://seumenha.ru/wix?keyword=codex+magica+pdf PDF link annotation
    • http://verification-help.business/dixitarupirojodexedefbbb22.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/kheicih/the_academy_the_first_riddle_chapter_2.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/vategajoxasimuvi.pdfIn PDF document text
    • https://weludabaner.weebly.com/uploads/1/3/4/8/134854782/6014326.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/ihfjfhk/26448290499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5fc9d3a15fa05.pdfIn PDF document text
    • http://5coupons.info/which_trigonometric_functions_have_asymptotesnmh5y.pdfIn PDF document text
    • http://lufatomitonad.22web.org/google_play_store_waiting_for_fix.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/gidujav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_601e537c01f95.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/450862.pdfIn PDF document text
    • http://curvepreloved.com/scrabble_word_reportlrhne.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/djdghgg/life_is_strange_2_soundtrack_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hiczjjs/last_island_of_survival_unknown_15_days_pc.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/rasekazolapaw_jodupemudun_davexusazuver_lulifivitozusil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tifusorozuja.rf.gd/1980_john_deere_410_backhoe_specs.pdfIn PDF document text
    • http://wotisonuli.epizy.com/31048374445.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 4864 bytes
SHA-256: 2f75f1678f1851fd90c90fc15665626681cde627fd83de300fe75d8c404bb438
font_01_sfnt_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 13316 bytes
SHA-256: d8fc2668e76db128231700313adb0f0e0bd871680f1be8c8eea5dc9a5f116aa6
font_02_sfnt_off00011304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11304 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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