Malicious PDF — malware analysis report

Static analysis result for SHA-256 3080849a7ed75da8…

MALICIOUS

PDF

69.2 KB Created: 2021-06-26 12:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d4fd5c773e898eee47eebdc362487b4 SHA-1: ac471c9a8daa3fe83101230b8b79788c0c28f129 SHA-256: 3080849a7ed75da839a9e48b330f3bb8bdcc377d759ecd271c5876e9152a78fa
176 Risk Score

Malware Insights

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

This PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous links to external domains. The presence of multiple links pointing to compromised WordPress upload directories and disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites. ClamAV and ML classifiers confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://kezmosas.hu/files/file/lulajuparexavuwisikurolu.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/8ib4ruvdcaov6ropjodbsi7pl2/dusonunat.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0961fd714f---bexaberunowufafamapisefef.pdf
    • https://rdsdealers.com/ckfinder/userfiles/files/26333965895.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/66255651816.pdf
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/funovevametu.pdf
    • http://gadkowski.pl/repository/filemanager/file/33574299106.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b9845a79---busesafufi.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/de857f8d97a8a450617f7c8b03b9003a/89483852005.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/277f46a716f31505deb5be88198e65a4/videbigadilopeguwo.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/76173fd7c5f298f93902fc3b36a59fbd/rujikituledunexegiroma.pdf
    • https://peilimineko.com/userfiles/file/33012811730.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a501686c---63088948164.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aab7bf9e589---texizegas.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/738b74053de9da26aec3cf285b100975/61561118035.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65c3c23372---xusozusasolilexoxavuruk.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/8abdd875c260359e97b66465160ca930/69503595208.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ccgd8hqsc207ubh9vjulbnau11/56844459487.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160776777b3be9---41850578024.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/5346bd47c312cbf16a7cd103d4e38c42/35911788893.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071052d63236---82937167653.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/587b5f9a5548add85234fce74b051606/23506123032.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607819972c742---48923802976.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/b03881ae95185924f020de3a854b1d0f/mimilil.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=newton+school+coding+questions+and+answers
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b34a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB34A 16792 bytes
font_01_sfnt_off0000cb61.bin
20f1004595a5004f6942aa06aa937a07378e9ad7ae747a7a12a3bae675327901
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB61 10956 bytes
font_02_sfnt_off0000e445.bin
11256e785dd3f4a8f647a43ec272e1f3f66793abbefcbf35eec1e73866463217
pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 14132 bytes