Malicious PDF — malware analysis report

Static analysis result for SHA-256 451ca1c963ba02a9…

MALICIOUS

PDF

88.0 KB Created: 2021-08-05 23:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4f265afb830e386bcac8439c64cfbdfa SHA-1: 1532156a6679dabb7357434964b7c93bdb7025aa SHA-256: 451ca1c963ba02a96ddf69ec020022014e2c0c22ed344d589651945e6e3e745b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress upload storage. The ML classifier and ClamAV also identified it as malicious. While no scripts were directly extracted, the structure and URL patterns suggest it is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16077667dbc5e2---joravisovudorobixuxo.pdf In PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df99d1544c3---26080480894.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927955c3ae2---jimuwinerebomifafef.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/derofubebokujifosusabim.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c18dc67191.pdfIn PDF document text
    • https://wipaphun.com/UserFiles/File/40857532527.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/30e5b08cafb2c39d81c0855701ce9836/45165460616.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/5d8ad3aee2bdc6dd9081efc4e586801d/ladibojelanekan.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/8icj6fnh431526g7j7c8robt95/kazavadelaziguxe.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///54953383831.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/hr82hp7qcebqk90cs1mpreohc7/32517748349.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/58395f4cb23e231a43a391a329080a04/12673050275.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/puvorapomi.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ce7ac8d4---64717366254.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160725826e66e4---xofogedowedogiwikinebi.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/3553068764.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/8jv2pn350e9pnel9at283ibr97/pebelopuzudata.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a55f64d8c---wubekekukidaluvefepe.pdfIn PDF document text
    • http://ruihuitax.com/files/file/joviludezozovepolikatonez.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/adb442a390874f014ce02fa7849d696e/98121370114.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/85557003216.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3b877574385e2ac51bd76af161f69214/58353742897.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/e520gmlkm6cea6h5g6622vu7nk/89807051517.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/vakejumu.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/59794220245.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/p24d71onn86ltv1oc0duu16dp7/27387698453.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160857b370b7dc---watedoxewubow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=what+are+some+ways+to+improve+your+listening+skillsPDF 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_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 16940 bytes
SHA-256: 58ba4afe3179211dacf068b03c4d0f27d29f5e8a2b8fff72018d4e24dba62e4b
font_01_sfnt_off00011fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E0 11148 bytes
SHA-256: 5fd5bba890677141b8648105b393a4cee232ba05c99cd374fb1e9832df11655c

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