Malicious PDF — malware analysis report

Static analysis result for SHA-256 7349d92f214f9c1b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-17 14:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba36b5ae508206bb2e990795e6a1004 SHA-1: e16cb1ec033a37e5abdd955bb96d3a40b6b354c5 SHA-256: 7349d92f214f9c1bfe324453129dfe00d671f6dc6b604fd853935a88deafe062
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'anticonvulsivantes en el embarazo pdf' and the authoring application 'wkhtmltopdf', which are likely part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/award?keyword=anticonvulsivantes+en+el+embarazo+pdf
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5ff51621632cb.pdf
    • https://cdn-cms.f-static.net/uploads/4424951/normal_602538652d189.pdf
    • https://cdn.sqhk.co/fifotadog/Vhchahh/labanuxufin.pdf
    • http://rasezinetoge.iblogger.org/radicales_libres_que_son.pdf
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fdfa16153344.pdf
    • https://static.s123-cdn-static.com/uploads/4446162/normal_6008c48897471.pdf
    • https://cdn.sqhk.co/pazakazagoz/hbichjb/top_topics_on_youtube_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5fe575e69b300.pdf
    • https://static.s123-cdn-static.com/uploads/4460228/normal_5ff2dd66d9ea5.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_600c9aa0543db.pdf
    • http://rekopeza.22web.org/2040865923.pdf
    • https://cdn-cms.f-static.net/uploads/4416791/normal_603b688053fde.pdf
    • http://damisidituwupo.iblogger.org/xakuwuvejibizetivamu.pdf
    • http://tidemelewofu.iblogger.org/17830350413.pdf
    • https://cdn.sqhk.co/fupupusamun/3jbZlij/sigaz.pdf
    • https://static.s123-cdn-static.com/uploads/4408720/normal_60034f1373458.pdf
    • https://cdn-cms.f-static.net/uploads/4427085/normal_600ea4cf114c1.pdf
    • https://cdn-cms.f-static.net/uploads/4481157/normal_6039db593c4d3.pdf
    • https://cdn.sqhk.co/penomufepuk/duieji5/nojejixeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vozerurivuboki.epizy.com/mirokeja.pdf
    • http://pupisovid.epizy.com/67424523811.pdf
    • http://zerujafulo.rf.gd/ensiform_cartilage_picture.pdf
    • http://mugekalamiwatek.epizy.com/ratovagemoxij.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82e.bin
e3f817794353134c35a95ca60c4ada3be49bf6b6e893a7b126283b3959377afa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 5540 bytes
font_01_sfnt_off0000fafe.bin
975cfe404ced842a58c43327452c614df091bc7c25ae765be308639564871fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 11572 bytes