Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6df08f6d03e76c…

MALICIOUS

PDF

79.4 KB Created: 2021-09-02 23:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 26dd10fafc31711ce43db5928ad7525c SHA-1: 4103380f11ff727a558009c3913c3bec35d9548f SHA-256: 0c6df08f6d03e76ccba37a66ae1e36e1ed76f8b2b5fb8f12045e0f99b17b4b17
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it is a link farm pointing to compromised CMS uploads and disposable hosting. The PDF contains numerous links to external websites, many of which are hosted on potentially compromised WordPress installations, suggesting an attempt to distribute further malicious content or conduct phishing. No scripts were extracted, but the presence of external links and the nature of the heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://philabc.ru/uplcv?utm_term=cmc+manual+jack+plate+installation+instructions PDF link annotation
    • http://sanders-scottfamily.com/clients/26926/File/97404633267.pdfIn PDF document text
    • http://cke.hk/userfiles/debiniwaduxabokemukip.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/gk3gn8784ui4pdshpvvqf3ntq3/kolirefodanogowixarejes.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/xukazogororejase.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c191ecb03cf---kibamotig.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/0dc4bc4d2083ddbc2457fca16807932f/37862408293.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/7017590144.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/92864645656.pdfIn PDF document text
    • http://dejede.com/userfiles/file/30669964768.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/xivipamokarilip.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/673b5cb5b406203ee0d5a5096aa379bc/kazosiburejexilobepolonu.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/62988043646.pdfIn PDF document text
    • http://ysenb.kr/board/file/editor/file/98396773190.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/99994842564.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d44b0acff1---7133527837.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/kowez.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/kotipajalaparusenel.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kizabarajosaxasobajanup.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bhvvnu79hb0hk8pvp8bhmn9fkn/25599671063.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e7e963e15---masivajopuregisojulosa.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/70061982081.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/71873386263.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca123ecebe---lezitulotozamif.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_off0000d1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 17152 bytes
SHA-256: 22b63f08a03a880069ff85a883f007cbc5a1655792985c4cc3bd0a340afa9f84
font_02_sfnt_off00011622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11622 10888 bytes
SHA-256: 7d0edfc5bc9f20a9e0dd05c3a8d7aff409a52657816ac9acbb5bba7be5572a95

Open this report in the interactive analyzer, or submit your own file for analysis.