Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ba2a773fc2be55…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 22:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 919d9b9ad3feb08fa56b4ab9803a3c9e SHA-1: 4685e9b51165fe043d09e5a3ebc671ec1491a7a9 SHA-256: 74ba2a773fc2be55220f47fc35ca8ee3e6a2e4b693c9702a2b5d5daab8b45912
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to lure users to potentially malicious destinations, possibly for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/90chrgr2ul73qmqn46t723lgvc/98069036995.pdf
    • https://weeb.nu/userfiles/file/towubodimil.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/o40eb2batnr1c0vjhte9oackn1/700197254.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ba756fa8367---39796053024.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908ee3b6215---84847913062.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/h3l6c0q5rmbct67mem39njra1u/xarezizemiwadir.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/7d9946eb75b3fd5a254fc615789315ce/62783211810.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/65938403602.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/49b1b129b014de0691826be73259409f/sojutumatimuvak.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/luosof1e1ggepua998di5f48bc/92563413086.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608400b1ec97b---dokakapikinarofotibebivu.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a948bea92fa---wesenojinadaxolaxure.pdf
    • http://cecev.com/stockages/files/78422872506.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0061c77153---pukenep.pdf
    • http://mfahk.com/upload/files/nebusoko.pdf
    • https://vinniescustoms.com/userfiles/files/60919111914.pdf
    • https://vegan-eshop.cz/data/file/dixofa.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094604ff36e5---33080502932.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7838d43bd0fcc0b3a539723cf70cbe25/61037144245.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29ed2ae3b8---32211545280.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946e0d7aa2e---sobesuj.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609282d42e43e---60614246219.pdf
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/66372099416.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d709770742debe8c278368dd735a71fb/86661946308.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3236538f4a5d471cff519fc3b71960ff/dudetudezuv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=good+speaking+manners
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd06.bin
51e8ba09de9154329d5ab9cde8b944fe17e13f0c2cd74b7594b7fe0829ef59d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 10720 bytes
font_01_sfnt_off00011567.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11567 16792 bytes
font_02_sfnt_off00012d79.bin
1535ff6e6e69a9264d62f83bdf4204360bac453a437638e964d9c7aa053d2326
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D79 16988 bytes