Malicious PDF — malware analysis report

Static analysis result for SHA-256 099e40c8bb4e6b22…

MALICIOUS

PDF

81.7 KB Created: 2021-03-16 01:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bed525181c440d221b662ca90b290074 SHA-1: 5bc9e768b6d3f88b148acb22c535354461f75465 SHA-256: 099e40c8bb4e6b22fb21a888d8ed1b33da3404388db5403b52a7b886e9c6e6cb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by heuristics as PDF_URI and EMBEDDED_URL. The ClamAV detection and ML classifier strongly indicate maliciousness. The document body, though heavily obfuscated, contains keywords related to a 'Toshiba led tv 32 inch manual', suggesting a lure to trick users into clicking the external URL. No scripts were extracted, but the presence of external links in a document flagged as malicious points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=toshiba+led+tv+32+inch+manual
    • https://static.s123-cdn-static.com/uploads/4377647/normal_5ff14da9361ba.pdf
    • https://static.s123-cdn-static.com/uploads/4450158/normal_5fe198981454c.pdf
    • https://cdn-cms.f-static.net/uploads/4370309/normal_60108fb04eee5.pdf
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5ffc7968adacf.pdf
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5fcea8897f561.pdf
    • https://cdn-cms.f-static.net/uploads/4388820/normal_603df59b4b10d.pdf
    • http://putinoid.ru/ncaa_field_hockey_shootout_rulesoix66.pdf
    • http://dixojele.22web.org/85698640748.pdf
    • http://futup.ru/golodimuwifokl43tx.pdf
    • https://static.s123-cdn-static.com/uploads/4393762/normal_5ff9ebcc7c116.pdf
    • http://digitalliteracyinstitute.com/1563778035798w0q.pdf
    • https://cdn-cms.f-static.net/uploads/4426677/normal_60362d098da3b.pdf
    • https://cdn-cms.f-static.net/uploads/4454671/normal_6010758c2480e.pdf
    • http://creamwalls.space/litany_of_humility_prayerr0ek1.pdf
    • http://janurikemodowu.iblogger.org/breville_barista_express_owners_manual.pdf
    • http://vilopeg.xyz/philips_avent_baby_bottle_electric_steam_steriliser_3_in_1dcudq.pdf
    • https://static.s123-cdn-static.com/uploads/4451565/normal_5ff336c065582.pdf
    • https://cdn-cms.f-static.net/uploads/4465025/normal_6040a0be5b788.pdf
    • https://static.s123-cdn-static.com/uploads/4527108/normal_5fe35b984cb2c.pdf
    • http://zisilusekaxe.22web.org/runufe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://viziwufeki.rf.gd/sukareliduseler.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f357.bin
46c4570c07e648e3edb2f94de82bd947231c55ffd100bf9f20987cdeeedd2e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 5412 bytes
font_01_sfnt_off00010590.bin
48a60c3bccb28a53442eac68a07138e003c0a29f5a6c5932b2952f293af60da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 11192 bytes
font_02_sfnt_off00012b9e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 4324 bytes

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