Malicious PDF — malware analysis report

Static analysis result for SHA-256 574ef6bc04ddbf20…

MALICIOUS

PDF

67.9 KB Created: 2021-10-03 00:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1e9ba15d19e2e1f1ea108cd1c27bfd75 SHA-1: 454ea4458fc9d98b9192a1e87bc77b427c092d50 SHA-256: 574ef6bc04ddbf201edee744ff17fa70fb2c2326c776628bf6d64f737f90e438
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect users to malicious sites. The document's structure, being image-heavy with minimal text and a small file size, is typical for a lure where a user is tricked into clicking a hidden element.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=disciples+on+campus PDF link annotation
    • https://producto.works/userfiles/file/98071148789.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/12359699523.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/31384429132.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/digowusadimifofotop.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/91357396668.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/wixul.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/22871537386.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/57571142141.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/luwalerulisitedusilefilum.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/66395643570.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/panigimupam.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/47992944152.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/95045669371.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/44697858440.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/16819525742.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/81007065138.pdfIn PDF document text
    • https://revive.fashion/upload/files/vamugogagevamor.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/34931148285.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/folerazubowusamo.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/93558189107.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/35545202083.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/melevomu.pdfIn PDF document text
    • http://pneusmarene.it/images/file/topofajunavowesujato.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/jumatonoxekidumineled.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/golirefafonuta.pdfIn PDF document text
    • 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_off0000aea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA4 14292 bytes
SHA-256: bc1d78d69d5abb442c28ddb1998b650704763e89c7965558062667ef05a146c0
font_01_sfnt_off0000d257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 10440 bytes
SHA-256: 3036b0d1b7a816a481de1da9030ec8dfd778457dbac4a63c691b44892516156a