Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d76a5961ed07d78…

MALICIOUS

PDF

83.8 KB Created: 2021-07-26 17:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dd7f1d9ed7618ab01566b0853c1f712d SHA-1: f7020d4a3c02deb5e0caf37a8b36d55db2154ed7 SHA-256: 6d76a5961ed07d78f3f8f5cb84efde644d24a91631d1e233c6e8a05d15495e63
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. Heuristics indicate a high likelihood of malicious content, and ClamAV detection confirms this. The document body is unreadable, but the presence of numerous links to potentially malicious PDFs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/edc3folvp8mv10s9ahcbss6p75/rakedukeledutor.pdf In PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74655cb815---53133130549.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160774f5b3bbb6---46750586216.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/3b5ppv7vjapummprghnfput18r/dadusedusumosijazuwapabu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fa21c1739---45403170772.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/df2ettr81d8ql8hvdl3ci03h63/94284591459.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/29695585916.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/2d9640837f7ee89ef4da58a525a37739/xapuzavelivalegujalaroju.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/58784746154.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/59947534725.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac27fa114a---75374371325.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/6987971ce9c8b0407deab144fb413acc/furopo.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923f4e36ac5---tafikijumomu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4m45hqco3tpipk40fv6nscj553/rivajilutu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a14a4bed2cd---kefaxikunenarivejalikifit.pdfIn PDF document text
    • https://bloc-immo.com/images/65005617635.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/86887779881.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/livimunazosexira.pdfIn PDF document text
    • https://airshow-bg.com/file/16163396708.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608692a9b02da---venex.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087240b3dc61---tedorabekasogofevare.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/72589347770.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/77831618804.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/64478696698.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tu+lagawe+lu+jab+lipistic+mp3+song+download+mr+jattPDF 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_off0000dd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD16 11448 bytes
SHA-256: 18b6325efc400b51067465b02d15beb67cfded750dbede7140daf30ec11528d7
font_01_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 17768 bytes
SHA-256: f8b7bcb6013b66a68191703fa04f256d9e1da1ee34ffa0f647120b8283fd7db9
font_02_sfnt_off00012669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1