Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6905a133938367…

MALICIOUS

PDF

83.7 KB Created: 2021-03-20 15:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c32e43d9e0d06d3172e6508257172da2 SHA-1: b5c87ee5c83d73781c0de1df724764ea390d302a SHA-256: 6a6905a13393836751e67899bfe9c59b96552f6c37e25bb96c473c6efe0e0f1f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=coc+barbarian+king+town+hall+7
    • https://suviliter.weebly.com/uploads/1/3/1/4/131453542/0527535.pdf
    • https://fivitilanafime.weebly.com/uploads/1/3/5/3/135395402/deburute.pdf
    • https://cdn-cms.f-static.net/uploads/4483867/normal_5fd193905b88a.pdf
    • https://cdn-cms.f-static.net/uploads/4404124/normal_6041d3c54a20d.pdf
    • http://ru-payment.casa/4693561428d2cyn.pdf
    • http://cheatyou.site/61532524795unms4.pdf
    • https://cdn-cms.f-static.net/uploads/4387713/normal_6032ab004cb95.pdf
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5fcd3cf169223.pdf
    • http://sapapubusil.22web.org/96680359445.pdf
    • http://psychologyrelax.xyz/vinujokabujokirarazvn2m.pdf
    • http://islemleriniz.org/48223731523jmix8.pdf
    • https://jadegivi.weebly.com/uploads/1/3/4/8/134851053/pifev.pdf
    • https://cdn-cms.f-static.net/uploads/4471682/normal_60146bf5ce3a2.pdf
    • http://kismyketio.com/zujalororijunoxag02hc.pdf
    • http://reduslimer.website/fofesosighfbp8.pdf
    • http://geleostone.online/how_to_cite_the_kjv_bible_in_mla6ep1u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tufujifinobiro/65548647509.pdf
    • https://s3.amazonaws.com/mefonevimimix/5810211396.pdf
    • http://ketanuviz.epizy.com/who_god_says_i_am.pdf
    • https://s3.amazonaws.com/zerepuzuze/pexoxejil.pdf
    • http://tukuzadixejune.epizy.com/jupevojejuzelasov.pdf
    • https://s3.amazonaws.com/fatikonavori/what_are_the_different_forms_of_words.pdf
    • http://suxorodefis.epizy.com/wopawulogewuvarala.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_off00010a75.bin
a43c6eaab4489f1cd1440c4a30e82debb53fe6bc15d2218444f567ee1f82595f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A75 5164 bytes
font_01_sfnt_off00011c20.bin
94783abf41546db5e917ba26ab44cf5839bed7ff3cf6eb2f608f59e439a6246e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 11076 bytes