Malicious PDF — malware analysis report

Static analysis result for SHA-256 961f9354e65422fe…

MALICIOUS

PDF

69.7 KB Created: 2021-09-07 09:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e3d2d78787c8a35e11fbbc5d906a262b SHA-1: d1a078f8a4c5ed7d2a92cd53cdef7bd7c00a7bbb SHA-256: 961f9354e65422feeb1f7abd041e8fe55041ec7971527f5014843255c19ad2dd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image, suggesting a screenshot designed to hide clickable links. Multiple URLs point to external resources, some hosted on compromised WordPress sites, indicating a potential distribution network for malicious content. The document's structure and numerous external links strongly suggest it's part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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 https://oniceh.ru/uplcv?utm_term=g+shock+ga1000fc+manual PDF link annotation
    • http://gelikonline.ru/content/Files/josoxusopaz.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/16155197909.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/6961178287.pdfIn PDF document text
    • http://shosholoza.de/file/wagisibosumusozo.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608832c8eb1d4---61315390194.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ff9973c8cce96d1be224c5f1707bde6e/tugemexe.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d22b42331---menepojoxipefose.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2538c19d180925d36b8651e94ae29e8e/9890935881.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e6ae17a28---rubasitatugen.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66675f2cf---norikuvonidagejipuje.pdfIn PDF document text
    • https://ms01bet.com/contents//files/memamimafolegix.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/72dce794c6355a5e295621df8446b1ef/lizabegisulujaxedo.pdfIn PDF document text
    • https://dhcom.vn/userfiles/file/rifopavate.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/50976087848.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/63760144711.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/4mrf2lpo626b8qau0ljtj9soc4/53770354791.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/vedujujafemaxogusogudo.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/64d94f1b9d8d07a10c2c8bc077738566/vexilekutilopuwesez.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160874b59c383a---86410277377.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/dixaleminivuwedemano.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/wijukilemomuribekel.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/bdb5819a547bd88305559a7cbdf0db96/misaselisunizo.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/21457707599.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b3d9c1a78---wifagumoredakefinivofi.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_off0000b52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB52C 14260 bytes
SHA-256: ee978c0e963e3035475f27da874b450163fc6d974c04138e1d078ea3d8b1b4ae
font_01_sfnt_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 10764 bytes
SHA-256: 7df95bce4bea9fd3755e327241f0cd1572c1ce394d14a84ce2a810a07147c580

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