Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25e3b4a873fcf1f…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 14:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b3f83501973e332d5574d0b08aaf3442 SHA-1: 44ec67a86aaeca316a2b6fc0a46bcabb050bc90d SHA-256: d25e3b4a873fcf1f3e56e43ece2213fd91b0d13a07d7248d5097e59b20e23f2b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and a machine learning classifier. It employs an image-based lure, presenting a fake screenshot of a game download page to entice users to click on external links. The embedded JavaScript and numerous external URLs, including one pointing to 'queure.ru', suggest an attempt to redirect users to phishing or malware-hosting sites. The document's structure and content align with a phishing attack designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 7

  • 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 0 text block(s), carries a click-outward action, and is only 69 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://queure.ru/uplcv?utm_term=plant+vs+zombies+2+mod+apk+unlimited+everything PDF link annotation
    • https://ht-cooling-j3t.com/contents/files/10748589917.pdfIn PDF document text
    • https://tepihtrava.rs/files/20203020342.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/watewodojikajivav.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/labokedemafukikejoluroka.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/patorirusexupaludulun.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/litupe.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66857853107.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/pofefox.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/62119164665.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1c986682c---negewovajujobeladulo.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/58175760764.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/90380147103.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/12703477333.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/rigitonasuxuxexakidu.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/wixeguxituleva.pdfIn PDF document text
    • https://f2h63c2.ip4secure.net/upload/files/narafelisitamupezesowag.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/rituxuxikajatakomopizur.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/gadamoxeb.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/gumufi.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161430b60eb6c7---narosiliwimezipimonufol.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/biwegipokifiniwujamamuf.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/56047200105.pdfIn PDF document text
    • http://pedraferro.com/files/files/bimotenomagenoforeneze.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_off0000ae99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE99 11532 bytes
SHA-256: e4a875f71c2eb337bff083609faf4986130a91f8be72aa3f0f89bd87e1b25ecd
font_01_sfnt_off0000c977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC977 14432 bytes
SHA-256: 4a5b5e5d021a34b003be18f34ca1d2af8b963f9d6d8339d2b434f60a328cdbce
font_02_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1