Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6f25d8a0f25d8d…

MALICIOUS

PDF

94.4 KB Created: 2021-07-05 19:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4588d13c59df13eafe9c47807a1fdbf3 SHA-1: dd25ae27bbf00cc1e534f48a55ee01306cace070 SHA-256: 0d6f25d8a0f25d8d982cfd7590bfcc0f9c803de80bf279d0d004b3310ebbf6ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the nature of the links and the overall detection suggest it's part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/5dcc441slj0nl1kg5j02362h3b/jemerorepewenubuxow.pdf In PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/nubotejemivakube.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/646ejogjq7lf5v6iu2m2n2gvlq/84201497430.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/78351312943.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/ranugejikudibupon.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ad2bbe484384334228cd07e016db06a2/36797427529.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/84672827113.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/4f4aea3cc996def9791dd50264c23303/buwokevoxuvepuxepi.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/92508709526.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/tajosinovigimal.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ifhrnkt38bm0rbov6m49ecarna/46265971957.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/zedonedebedilajo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/69931bc1c212f0af6802b5776c04c368/37154783273.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/c5c2935cc456699e8199ae5be2189b57/subapobofinuxeroniketox.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0c4cb6e52---rerasumabasujavet.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/44558054146.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/27220056631.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/21ab591f261d538ff879ba976e9e9aa1/91498443168.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4mt9ktdpsen19bec52thf25luj/nabesipujidimegemolaxot.pdfIn PDF document text
    • https://maisonforville.be/documents/file/gatuvul.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/4aeb6bd615017ebdd7fbe80ebe352466/1774008121.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/97470042771.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/kidavajivorerakifekuka.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/1bf3e93ccde7cf94a96c70d886312835/xejaxemofaniko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pics+viewer+for+pcPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 19116 bytes
SHA-256: a6b77c9a9dd39e99c879d8698c33b91fd3bc77ebbcff32c823a9b0afb11abe46
font_01_sfnt_off00012668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12668 16304 bytes
SHA-256: 75d9bcb141f15990f163efa43d9bd2774c9610344cae59bd23a7d17622d8a73a
font_02_sfnt_off00013ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000154b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B7 10216 bytes
SHA-256: c3f504ab8d5eb8424abc92167164a56062f4a33ce8aaf732e552c438a8d64ed7

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