Malicious PDF — malware analysis report

Static analysis result for SHA-256 317af9b5f767227c…

MALICIOUS

PDF

72.2 KB Created: 2021-08-20 13:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 067664dc2eb949832f95bd4e02692b36 SHA-1: 5f1977d30502ef3b84bff9696cf07dba11704307 SHA-256: 317af9b5f767227cc6a91e021d2fac7d846ae237fdc47f922a7e76a47d6edc8e
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://signika.pl/Upload/file/81299927977.pdf In PDF document text
    • http://wildpflanzen-planung.de/file/wiluvuzeredeve.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/44184415619.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd78fab8b33---risodiwabatugolinomeledok.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-12/20210512085603747864.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/364de72285eedc2be3721310dc0a9e47/1486593068.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/sukividoje.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afd155748f2---neder.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/36a9efb30b7fb80482f3777e69d346d2/remexatopuvejibalapan.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/53187348944.pdfIn PDF document text
    • http://steffis-strassladen.de/userfiles/file/76920626922.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/abd87f82c6d8413f82e5c1cf730b7a07/22002288321.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/pawasijipepijugifobemi.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/b7373f7ad15ad3a61e29b084fba4b088/lurasopava.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/46497640467.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160720079d10df---zadoke.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb33c98917---58364666501.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/92006618902.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/98844880503.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/ocjh40rgdh9l74odau361jfn11/leparozomalenita.pdfIn PDF document text
    • https://ksdc.in/userfiles/file/25991585956.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/jurikid.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/b7fc27597a47956127c062ec6dce97f6/fubizojipezizakulufasamev.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///66325699008.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/312416ed770363a5bbd412f96c209a57/68173549079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+reset+night+owl+dvr+passwordPDF 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_off0000bc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AC 14884 bytes
SHA-256: 3a0916148a9c608c85fccd696100dc89545bc31cf9e157f1bdef4f5ed37cf573
font_02_sfnt_off0000fa7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 10816 bytes
SHA-256: 2a2d17229e387137e6d133fe74373137cfaad1f5563799e22dd44c9374d82fb5

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