Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fd84c66cd9d746…

MALICIOUS

PDF

77.2 KB Created: 2021-04-04 14:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c22b73f505b7907e511fb4950cd9ae3 SHA-1: 68a1679a74f3981f47799970c9bf7a4f1985b2d2 SHA-256: 40fd84c66cd9d746e8efa49410cbb8de8b584109d948b844300392cfa8bfd83b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=router+guide+rail
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/9376134.pdf
    • http://myluckybet.xyz/maforul2osv.pdf
    • http://zodimevumu.22web.org/keratagubibumofimozi.pdf
    • http://f13x.xyz/xepamuksn6q.pdf
    • http://powerpoint4you.ru/how_to_be_fast_in_mental_calculationsyrdh4.pdf
    • http://prostotit.site/simple_valentine_cake_decorating_ideas4d7oz.pdf
    • http://sodaapp.pro/commodore_64_keyboard_usb7o2a0.pdf
    • http://reduslimitaly.website/how_to_trade_forex_by_yourself11pb7.pdf
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/jozedekugisoriv_zuvolozigeg.pdf
    • https://woxigixekamut.weebly.com/uploads/1/3/0/7/130739530/955a84d960c3.pdf
    • https://gajinuware.weebly.com/uploads/1/3/4/5/134597963/gowevar-tuvixudapoton-jenati-fagegow.pdf
    • http://artdebug.site/granada_reports_weather_todayjvrag.pdf
    • https://zalevetupuxigex.weebly.com/uploads/1/3/0/7/130739655/taxidaf_wikuvida_nugowutex.pdf
    • https://xilinupuvawede.weebly.com/uploads/1/3/5/3/135350476/xegijuvefegeza.pdf
    • https://lafakizivubev.weebly.com/uploads/1/3/4/7/134767266/sobubunuwozozibede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gobavaduxa.epizy.com/bavigititu.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/auditing_interview_questions_and_answers.pdf
    • http://rinivuwuvo.epizy.com/garaz.pdf
    • https://s3.amazonaws.com/gapuruxumeg/fluval_207_dimensions.pdf
    • http://raredinufewota.epizy.com/tumuguvi.pdf
    • http://jofeliruf.rf.gd/17010093516.pdf
    • https://s3.amazonaws.com/libusamagowuvo/new_bollywood_movies_trailers_free.pdf
    • https://s3.amazonaws.com/defujo/organizational_behavior_17th_edition_-_standalone_book.pdf
    • https://s3.amazonaws.com/dowesitobuga/32383363691.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_off0000ef53.bin
40a9754948626b12ddff6f8b9695962bd8940f010cf47298fa3803d369221c2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 4820 bytes
font_01_sfnt_off0000ffcc.bin
4fab8e1cb6047fbb1c42034bbf80fb287b7a87e3241a16d65ac6f318f85be7b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 11076 bytes