Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5a2db7deddfbff…

MALICIOUS

PDF

89.6 KB Created: 2021-06-29 13:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 333f370e3eef671ded19ec86d7ed8e85 SHA-1: 788d1c3997a7fc6f6760dc3f1b3cbc162a292550 SHA-256: ce5a2db7deddfbff5e96478fbdce9b56a821592b86ddadf2b19f01ea555ee250
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting, likely to host further malicious content or redirect users to phishing sites. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c334e9f6d976fb919a729e2b2cd22cc8/90600616842.pdf
    • http://asupuro.com/upload/save_image/files/serepukezaguwowem.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b689c2097d9---solepe.pdf
    • http://ddservice-bmw.pl/userfiles/file/lofajumilesigiwiguloxes.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a1832005---monepufotas.pdf
    • http://www.bluewhaleline.com/image/upload/File/xekekepatemulawawakenopat.pdf
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/piniv.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/a35ee018d5f16fc92d67715840fbb6e3/66602977410.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f73f3023---699244042.pdf
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/daxajoto.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160769dc7195a8---detuwimadul.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/79f2a0d845cdfe6c69d720f16eb41f3a/9080912596.pdf
    • http://av-jet.ru/userfiles/file/10131762706.pdf
    • https://abugfreemind.com/userfiles/file/sewikeliluto.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/711bdcce2362affe8933919a7080b485/42779543596.pdf
    • http://tunesistudio.eu/userfiles/files/1417439539.pdf
    • http://adabaskimerkezi.com/upload/file/lowijesur.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1df9455aa981a17fee6572573eab200e/gajote.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609588a09cac3---10911003571.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b8c4bf9b---birege.pdf
    • http://xn--aknmedikal-yub.com/uploads/file/xukaxutu.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/coi3kmb3c04hi902i50p2qe0pg/zoserupatumemegadomurepef.pdf
    • http://bukharageorgia.com/sites/default/files/file/duvopefi.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16095f20146926---xarobotepak.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5cb5701f2e6a35807061ae7134c1e6e2/lidivorimazegibiwebax.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=can+failure+make+you+stronger+essay
    • 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_off0000f8d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 16792 bytes
font_01_sfnt_off000110e2.bin
cc07561c1f76f043651a9c9ad32c9319ac12d10a8cfb0c14010425ef69dfa4bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 17276 bytes
font_02_sfnt_off00013dea.bin
5132b486458cc9728166b54e1f81842722138db81ec90080192b1b638b3b3cae
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEA 10896 bytes