Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f659891255bc22…

MALICIOUS

PDF

76.5 KB Created: 2021-09-16 06:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a863a7b010bd263b1638f11436f5395a SHA-1: 7a5051207469832224e54e78d35d6d68e18eb5ca SHA-256: 07f659891255bc22b2bd3ab1488ba9f0b08d93401c3a590d4f685bfae186c223
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, suggesting it's used to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of multiple PDF links within the document further supports its role as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smartmedia.ro/app/webroot/files/userfiles/files/sofeve.pdf In PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1a9e23a2779a774db0e064caa428154b/doxarevexovajananof.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/84470575993.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd3567e1ad---83514441431.pdfIn PDF document text
    • http://fpole.ru/sadm_files/kexanodabusizo.pdfIn PDF document text
    • https://speculatio.in/userfiles/file/96336547277.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/5759974918.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/58743273928.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/xixozoro.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/68962202021.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e5139d63f---xekegemanereli.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16131d7e578d58---71705045696.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/70065912258.pdfIn PDF document text
    • https://tipresentoio.it/images/file/90690052359.pdfIn PDF document text
    • http://philipsphotographystudio.com/gilojaginupabironu.pdfIn PDF document text
    • https://ribaczpeter.hu/files/file/48768197764.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/rimalamolox.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/86499454525.pdfPDF link annotation
    • http://harissarantis.com/userfiles/files/texomakeneloruwaneredakaz.pdfIn PDF document text
    • http://goref.ru/files/file/pisusamorevide.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/68319756735.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/jamugawetisu.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/60349230444.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/65842803056.pdfIn PDF document text
    • http://net-work.cz/data/file/89542312826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+broken+hearts+gallery+full+movie+123moviesPDF link annotation
    • 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
stream_002_off0000c29b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC29B 17960 bytes
SHA-256: 9fed2cdece059db54310e365c837f9c024fda63a972b5d4bf4c0d640fe5ac339
font_01_sfnt_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 11480 bytes
SHA-256: 6010fbe138cd24614c5aaf0288e96252811a8a9f2efd43ace850c7af989412a4