Malicious PDF — malware analysis report

Static analysis result for SHA-256 d414ee16ca301ea0…

MALICIOUS

PDF

83.9 KB Created: 2021-08-15 03:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb4aeb975f5d42f44ec4e23825b09966 SHA-1: 048acce0338a86a5b7ac1b1fc567feab7910cd17 SHA-256: d414ee16ca301ea0d9c53df3cc5b5b68da32eeb7f1a66f7b22bb3d885509e578
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the 'callback phishing phone lure' heuristic suggest the document is designed to trick the user into visiting a malicious site or initiating a fraudulent communication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=mesures+de+longueurs+cm2+s%C3%A9quence
    • http://fertilityupdates.com/userfiles/files/buxudopewe.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608782b2ceccf---53236106227.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3d381b2c---83056438939.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16077557f74eec---nopoxalesoderagu.pdf
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/14118294399.pdf
    • http://spreewaldatelier.de/img/editor/file/15814264204.pdf
    • http://immobiliareborghi.com/userfiles/files/16658827730.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/465eed552b5eb95e336365c2838d3043/62095999541.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f477ee6ce3---64941594958.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e166160bb---54047251937.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebada036f---putefizamisenijujof.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6715fcf6ba---lonapaj.pdf
    • http://aliceinformaticasrl.com/user/pages/24289296397.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/c0o1sgggbd5m37c51um6o7l890/24027296950.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3b0ca5138a7aab3ee1d56e30820a74e1/fifikotek.pdf
    • http://anandamsanyal.com/userfiles/file/8185876336.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0249b531d---gumad.pdf
    • https://psfund.org/public/uploads/files/cms_files/55395684027.pdf
    • http://janandpoos.com/clients/872640/File/vofozajewi.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12a69adf09---92754045765.pdf
    • http://exdebt.bg/userfiles/file/sazubonuxubigelukut.pdf
    • http://kursadowicz.pl/Upload/file/98662623127.pdf
    • http://thetestmag.com/userfiles/files/pevefosetu.pdf
    • 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_off0000de78.bin
bfb57ec31d0c3b76c7ed6cae2049f995986efcd03f97161bd6757f1dc4291eb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 18900 bytes
font_01_sfnt_off00010e19.bin
29c78473d97a983ea1d8e66ae58aa13d02b78487a449f1c3462db74a109959d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E19 10872 bytes
font_02_sfnt_off00012672.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12672 16792 bytes