Malicious PDF — malware analysis report

Static analysis result for SHA-256 df101525de3fcc46…

MALICIOUS

PDF

82.1 KB Created: 2021-03-26 08:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7106eabbf2450ea0465835eb2b350884 SHA-1: 7af8a4e3c03708b4130a585ccad4f9f5dc22e333 SHA-256: df101525de3fcc46ad597e736597aa09f6088746a67bccb2c5ad93eb2cd9c404
96 Risk Score

Malware Insights

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

The file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The primary malicious indicator is the embedded URL pointing to a suspicious domain, likely used to host phishing content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=the+high+school+musical+series+cast
    • http://form-lnstagramcopyrightservices.com/meguzirigakuguzatlv3tf.pdf
    • https://cdn.sqhk.co/difigobon/eibFjcb/pocket_build_ultimate_sandbox_building_apk.pdf
    • http://sewonmedix.ru/dadodevotovijayqaw9.pdf
    • https://vavurozuzen.weebly.com/uploads/1/3/1/0/131070500/zadufemekubofopetu.pdf
    • http://hushseo.online/los_pinguinos_de_madagascar_pelicula34jsx.pdf
    • http://taxevidel.medianewsonline.com/54859491116.pdf
    • https://selubigal.weebly.com/uploads/1/3/4/5/134518702/mebirasolevutonin.pdf
    • http://samettemiz.xyz/61167327959ik84i.pdf
    • http://antileqphh.site/waxewegifgfgdd.pdf
    • https://juvejisedebuz.weebly.com/uploads/1/3/2/7/132740880/bf3cb2ea6.pdf
    • http://funseeds.site/how_much_for_adobe_suitebji37.pdf
    • https://cdn.sqhk.co/lazimafuxuxi/abMjjyj/gisub.pdf
    • http://neyroskakalka.site/jajunivepomapogonejasunu3hh.pdf
    • https://cdn.sqhk.co/soxuvezosapa/ifnLs3M/alarm_clock_radio_amazon_uk.pdf
    • http://itgermany.net/binomial_theorem_pascals_triangle_calculatorllplk.pdf
    • https://cdn.sqhk.co/wujamufaw/shfcicS/vawadomemutubazozolobane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://satogitexuvo.myartsonline.com/vampire_the_masquerade_tzimisce_clanbook.pdf
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_fd9f116162234a0a8b0bdaa9bbde9324.pdf?index=true
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_960c5f70d14a4227afd226fdbdc23efc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001036c.bin
aed927b8f799934326a24fd878156931c7a0d9bea09f274601b66a8a7169f484
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 5164 bytes
font_01_sfnt_off000114d2.bin
f7da553aa4962b325b0807f130f1ab1ab39b06c8c346b12d5f5ee8156de8b9a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D2 11184 bytes