Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf7b8a3039197d6…

MALICIOUS

PDF

86.2 KB Created: 2021-07-06 09:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d15d5b8adb0e1389e037b04ed87a7501 SHA-1: 7b5514d843897f16d96b1b1eb3eeb43d79c8f084 SHA-256: fbf7b8a3039197d6e672becf65ffc05eb5d6c06d41aa0fd26630959465499d70
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, indicating a likely phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and URL patterns are strongly indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://cructi.ru/uplcv?utm_term=olympic+high+school+yearbook PDF link annotation
    • http://ed-web.cz/userfilesfile/15354543228.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fdff08a28---fesenenapax.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/jufogajelorutaguwupavixi.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/xajexubeloveza.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/18137689604.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2090fdd9---69690258721.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/49411571989.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5bc86512a---jebiwofonavemoravuboxiz.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/68672afdb5258b14ee552bcb6c71d5a5/69051236241.pdfIn PDF document text
    • http://gillyard-johnson-mahoney.com/clients/62114/File/42291110567.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/bazosonibag.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ec32f0fd9a6ab751ce4aafe846bdafa/rukelowopesokalujibut.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/jenasobaruvojowuzutokanor.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ede93d1211---xewikajozopinupab.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/31765721649.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7e0f04658---28441562347.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/33273652009.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e46ec3542957caf10d65896fc02df9bd/98261075081.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5ac4c08cf901ef0a076d8d98f29200ee/ladesozonewepeja.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/4e756b7cc187f0bf850bdfa60318431e/lagevaguwuv.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/8d941733642ff76ba5699f39855362ab/ritovigurefukekif.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/gurodunekubizupexida.pdfIn PDF document text
    • 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_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 17872 bytes
SHA-256: 197fbe51bf5aa65f24d91a1159f720db6b96b4c1c85322367079d6b3f816c6fc
font_02_sfnt_off0001326a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326A 10992 bytes
SHA-256: 675f8edd6e688e43e471e6eb710892621b6d5602cc63f80a1bb6af7a9f12dc73

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