Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d0ce824ab5dc9c…

MALICIOUS

PDF

208.5 KB Created: 2021-07-07 01:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 27eef9e4025aa0ef7446f9c2a5442d8f SHA-1: c2a8164f71a53f1a546337864282ab365036f42e SHA-256: d5d0ce824ab5dc9ce63d72371b126a46d0243d04c3a13bb1046ba5dc9d3cca0e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or unknown domains, suggesting a phishing or malware distribution scheme. The presence of PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM indicates a link farm hosted on compromised CMS upload storage, a common tactic for hosting malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yonseri.org/userfiles/files/rudoginudamuxax.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/dfb1e7d47f83ea4bb28cf86984835e1e/44925830859.pdfIn PDF document text
    • http://chromavials.com/d/files/jusezokis.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/4757066268.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d6ae1a98f---rusuroluzasemexakipes.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862df5d6e5d---87014186732.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d7395f50a---jusabidefiranetikusatonup.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/59717478002.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/1nqoaqldqu90moaqjrlm83n4ri/jejakiribof.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/38406648615.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210630_634D83C38C2BFDC5.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/bc84aa772eb2d8f54bf8dca987782d06/durusokezujiw.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bba2c27a6a---moginuvusino.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/1b4d9ab6d06f230883e44b7acf971e00/vovijaxofapatimatebosa.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed116dbaab---kagufufuwonefenuxes.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/40455735121.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d407b45e571a37f8ec3d325a2ebf3a39/42239811355.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/xufobojujipuli.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cadd387ee---soniki.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/63260823895.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/66075005873.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090709c8ec4d---judefisefewekarofadav.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/p20hus2g9gensr9ge986rt7dl8/51772608522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=jorge+bucay+the+road+of+self+dependencePDF 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_off0002c32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C32A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002db41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB41 11152 bytes
SHA-256: 0d9701ceb1940c01a8a68551d2f76f0fd5a5536e6d6d9d06c977a7f3059ca66c
font_02_sfnt_off0002f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4ED 25820 bytes
SHA-256: ed6a4df374cabf66cb9c50642dde9e8b59584e07ae91db3109949d832d2ee3cb