Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab68bce56e779953…

MALICIOUS

PDF

87.0 KB Created: 2021-03-27 19:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e926887f07778460c753773cd05a041f SHA-1: 2e3c418e260e9f7303481b90a312aa7f0d74461e SHA-256: ab68bce56e77995368352954940045b19da3a2eabfd30bc17a112bc86e00c162
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and potentially malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common lure for initial compromise.

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 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://botokaw.ru/wix?keyword=the+bridge+called+my+back+pdf
    • https://jakuxibakamu.weebly.com/uploads/1/3/1/4/131407414/novenatirurix-nafojowali-sowezojiz.pdf
    • https://cdn.sqhk.co/lilanoto/eiaiJbE/31735753692.pdf
    • https://cdn-cms.f-static.net/uploads/4426954/normal_6036cbc24a6a8.pdf
    • https://xepudala.weebly.com/uploads/1/3/4/7/134737014/pozulanavefu-veseteziwizob.pdf
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/kedonilot_menusexa_wemomo.pdf
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5ffb202660e12.pdf
    • https://cdn.sqhk.co/xegunorasu/jghja7Y/76488792994.pdf
    • https://lusixepapage.weebly.com/uploads/1/3/4/6/134605241/cf0f2fb.pdf
    • https://cdn.sqhk.co/zozusexub/jcgfggu/mowejomodonuwuwiluz.pdf
    • https://cdn-cms.f-static.net/uploads/4497650/normal_603ccb28465c1.pdf
    • https://dadizatutelebi.weebly.com/uploads/1/3/1/0/131070904/3702799.pdf
    • https://cdn.sqhk.co/nenakowi/jgjcijk/ark_survival_evolved_cross_play_xbox_one_pc.pdf
    • https://cdn.sqhk.co/subilikiwi/chfkhcV/archery_set_amazon.pdf
    • https://lovevisop.weebly.com/uploads/1/3/1/4/131410094/9402043.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/742f72f3-7f37-44f1-9677-c6320c483a00/nordictrack_rw850_rower_review.pdf
    • https://uploads.strikinglycdn.com/files/56e6650e-638c-4fa5-b742-107e03889052/how_to_bypass_the_timer_on_my_turkey_fryer.pdf
    • https://uploads.strikinglycdn.com/files/3be87901-5435-4ba6-9add-0b1e280c6fb1/vajujetukuvuwilore.pdf
    • https://uploads.strikinglycdn.com/files/587fc069-55ec-4efd-9c16-975e9c83a5b5/tavanamoketoke.pdf
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_5a2ba26f5eb842359b487c3ad57cc89a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3bcbb248-120b-4eea-9515-ae79b54bb5ed/kewasufile.pdf
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_43aa681de1344c708bb121a8c9759b03.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105fa.bin
30bf578d7d31499ba01c900b707cd5bebad35bbc9464e371737545b4be92f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 5140 bytes
font_01_sfnt_off00011777.bin
31109a7cf5ae40ae65f0649263fa3ba820e5f0b4027acf5054c8a4a5acbc6bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 12192 bytes
font_02_sfnt_off00013f60.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F60 4324 bytes

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