Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fcf8a41845c2e1…

MALICIOUS

PDF

82.3 KB Created: 2021-09-12 19:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93d5a27962eede12dfb58b9c847fd924 SHA-1: d13436eaeb41e1204f43ec97dd8d8c7a6a831337 SHA-256: 45fcf8a41845c2e18ea01de4d9233e7eeb91051b3b3a12857f2dc6c784233437
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm with numerous distinct hosts, many of which are unknown, suggesting an attempt to obscure the final destination or distribute payloads from multiple sources. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kingdomdatesuae.com/userfiles/files/zexix.pdf In PDF document text
    • https://alice-immo.com/userfiles/file/98577360236.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/87502337792.pdfIn PDF document text
    • http://newworldss.com/uploads/file/54685442201.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/32103354869.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109031003304046.pdfIn PDF document text
    • http://smirna.pl/files/file/sarixivodowedotuluki.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/jafapofavatotasawibez.pdfIn PDF document text
    • http://snft.ro/media/file/xikezozesemapoxumuj.pdfIn PDF document text
    • https://destockbaby.com/ckfinder/userfiles/files/jarub.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/8470479701.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/sujizupadufabigi.pdfIn PDF document text
    • http://bankerz.in/qpic/files/kosav.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/gejanovuluwumugar.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/gavulezofizegafoxudofivu.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/83574bbcaa5474133ce948db207236aa/76029995128.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/88bf8440fa3797885e2e4e8461908b50/pakasotomitabuxikibod.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/17498103289.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/64256870980.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/6120284748.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/48579065897.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/15946190592.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/saxunefadove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=introduction+to+evolutionary+computing+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D0 11028 bytes
SHA-256: 89be9663183edd7274a63235b97fac9d735866ef4083ddec3256446f4d2945fa
font_02_sfnt_off00010c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C43 18100 bytes
SHA-256: 89822f22f3711e12a4dca1c1dcbb0cf7d2ba634905c6ba2afd38805c6572c32d

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