Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bbcedf2c46cc02…

MALICIOUS

PDF

68.2 KB Created: 2021-09-19 14:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 221704690f755f57fd9a50c2b1ffab3d SHA-1: 52d26c4750409502a9489d1cccb08ce8f3f9b90d SHA-256: 96bbcedf2c46cc02878be398cbc5d89c6551e9c33b982dd1ecf300c67d35aa40
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure, likely designed to trick users into downloading malware by impersonating a legitimate file. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document with a click-outward action, typical of phishing. The presence of numerous external URIs, including one pointing to 'pixomot.ru' with a 'download borderlands 2 android' term, strongly suggests a social engineering attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 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.
  • 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://pixomot.ru/uplcv?utm_term=download+borderlands+2+android PDF link annotation
    • http://holidayinntorino.com/userfiles/files/92664562562.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/60800160473.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210916221701.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/77513539334.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/44993265575.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/87296816344.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6771476bd---rotav.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/51451659629.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/jegosotafanisupalevuv.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/sisiraworuva.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/gibopovugapavumafe.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/lebadamuxexonajawe.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/66606665852.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-9/20210909125008985796.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210919075408.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/regek.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/20725665146.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/56495995833.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/89957985469.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/zumudal.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/558b3308db2cf228b69cc850586c4868/21866594771.pdfIn PDF document text
    • http://maksimetall.ru/files/90565920622.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/soromuribet.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_off0000afc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC1 10488 bytes
SHA-256: 6d743ee77f0e9b987a67f14aa6531d3a43f2d3b737e2dce05f0a632d30cd57e6
font_01_sfnt_off0000c7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD8 14252 bytes
SHA-256: 56f96c6b5d56be39f15c219541cf5afd27b0ed7fc417640d63bb76760c3be682