Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8086b078014a12…

MALICIOUS

PDF

82.5 KB Created: 2021-09-20 19:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b6c6708743891aa69dcd043982c8cb1 SHA-1: c2b49d1d093d58626e31e910d597b1cbd92cc41a SHA-256: fc8086b078014a129fc63fb1b2b545fe49511d3a2b35ea31b6a1295d0df6ba69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=fire+red+rom+cheats', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 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://pixomot.ru/uplcv?utm_term=fire+red+rom+cheats PDF link annotation
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/jawibakofesadibulefimazu.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/48506393151.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/41282270089.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/jovivi.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9c82c4b04---25212823788.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/jaxorasuguzelunej.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161385c6ae7548---28289175160.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/13554307202.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/11964125020.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/netonafisitipagevifedepe.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/18417543184.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/91510118205.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146ce9348491---fidutezanoludafosamofu.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/pifozivozozizikemokuwiwu.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136925f1d53f---98215445661.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/66425476414.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210907_5670560B5C57E763.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/kazeg.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/44094501843.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/86704783575.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/21950361291.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/20005514095.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/32730556189.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/xuzuxurojeti.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_off0000db98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 10464 bytes
SHA-256: df23973c665ff063b09587d537369ca9924d53f934b0258f6a6db0a4c9ff97e5
font_02_sfnt_off00010b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 18692 bytes
SHA-256: 030e5b8b4287ec7ac9efd81ecca9c6a91c932ceb32f9e0d2516628f1d3128119

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