Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f60efc612f7490…

MALICIOUS

PDF

67.8 KB Created: 2021-09-12 23:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8be9ad6f53182d9f8dcca9e5f5d72a7f SHA-1: 19e2051b3090078df023767cd51d04d7a044298b SHA-256: 06f60efc612f74900d94d3f3f9c6ad6ca8e09479646bebbce132c17d38581cd8
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-based content, designed to trick users into clicking embedded links. Multiple heuristics indicate it functions as a link farm, pointing to various disposable or compromised hosting sites. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content, likely for phishing or malware distribution.

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 http://josquin-capella.de/download/gobubajozoxasukefesimofaz.pdf In PDF document text
    • http://terezmisszio.eu/files/file/82201953920.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/xifabu.pdfIn PDF document text
    • http://gojjang.com/uploads/files/93432350445.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/46818931399.pdfIn PDF document text
    • http://uteambio.com/upload/files/42332090305.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/dovikag.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/mimuzirasapavi.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/32953663118.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57610835220.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a0c7df671---birixuruxukukej.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/26447997764.pdfIn PDF document text
    • http://regmac.net/userfiles/files/nolije.pdfIn PDF document text
    • http://btfa.tw/upload/files/xuxatadinazevipe.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/debotovax.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d46dbd669c---loparomamimi.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/64736083432.pdfIn PDF document text
    • https://csodamalom.hu/files/files/vixiwezeserib.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/ludekomamigufepujazis.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/71b62ac3cd15cfe9528ef3ae64fdf1bb/8040144735.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/lajetiwugoxebu.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/13290413728.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/76249522998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=samsung+i9305+flash+filePDF 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
font_00_sfnt_off0000ad8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8B 13896 bytes
SHA-256: c3d4ad82798757d140aeb7a8150f9f4bcf5c16bd9607763f22aa388f824f01aa
font_01_sfnt_off0000cfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEE 11116 bytes
SHA-256: 7985e400e847db7a22e9c297dccd6794f564d946d9618ac4e56cc233ee0a3b37
font_02_sfnt_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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