Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec6e94c5d9cc5fd…

MALICIOUS

PDF

67.6 KB Created: 2021-09-25 05:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a96184a189d52d187aeb04c6211835e SHA-1: 1aa8739bafb9d492452d9d4529c032a9b52a4d77 SHA-256: 0ec6e94c5d9cc5fd1cbe28f0547796676b5f57430708c2b3c7ae52256e228ce7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. Multiple heuristics indicate it functions as a link farm, pointing to various domains, some of which are associated with compromised CMS uploads. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect the user to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.
  • 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 https://dintek.eu/uploads/file/piratomirolixapis.pdf
    • http://textstricker.de/benutzerdateien/litorejogoratem.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/64e263661277044cbf80ecc0baded2b1/64112391880.pdf
    • http://placidlakes.com/larpm/uploads/file/rogoxapisemu.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614e6ba99a3ba---18601336920.pdf
    • http://01host.ru/userfiles/files/buluduvolesobosutavijus.pdf
    • http://annabarons.lv/files/files/59830140282.pdf
    • http://www.gonouvellezelande.com/files/javidarakosuriraroxi.pdf
    • http://bbhshipyard.com/userfiles/file/setupufikawutaduw.pdf
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/76745736924.pdf
    • http://besteva.com/upload/files/nevumivagugogawojiduvak.pdf
    • http://owv-sad.de/userfiles/files/zosufozokadebofiwudamon.pdf
    • http://inlovehuahin.com/file_media/file_image/file/20147876338.pdf
    • http://app0.linkeo.it/ckfinder/userfiles/files/61059767489.pdf
    • http://steinemann-ag.ru/fobozo.pdf
    • http://cuboni.com/uploadfile/hong202109191116101270.pdf
    • http://wxhsbl.com/ckfinder/userfiles/files/20210916_021848.pdf
    • https://alkoplast.rs/files/72083407384.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc7353512a---nejafunexugebebarezif.pdf
    • https://songiadahoaian.com/upload/ck/files/90461795829.pdf
    • http://jinistudy.com/_UploadFile/Images/file/33185973066.pdf
    • https://gtnet-engine.com/ckfinder/userfiles/files/xipivusomilulesifimup.pdf
    • http://be-now.pl/userfiles/file/73086297820.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=top+ten+strategy+games+for+android
    • 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_off0000ad96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD96 16792 bytes
font_01_sfnt_off0000c5a8.bin
79e9515ffe8351093158e1fe0fa9c2622261b2e1f46e19d5b026bb7eb22ddae6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A8 13840 bytes
font_02_sfnt_off0000e81c.bin
e6d4406ab9528b4172a3a03709e74ce2ed3286e5f429604fac6eb7ae49f09b7f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 10872 bytes