Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3448fc20a06c274…

MALICIOUS

PDF

89.1 KB Created: 2021-08-13 17:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a29452eda80426b59a3d3d1fa8ae9f39 SHA-1: 70dc0a673c644651836fad54da25a025b397544b SHA-256: e3448fc20a06c274ff54684deda2ab1b3835061cc2330ea1070e4e3c81184808
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple URLs, including one hosted on a compromised CMS upload storage. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these external sites. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://screen.by/images/file/52039497433.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/tuxofugoxejupitazovawaf.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/27574270643.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/99990894611df10b1116502281e99405/banaz.pdf
    • http://philboyd.com/pefoviromaregorelepolajoz.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2480b039e734b755451d36e2be4400a1/sibotikajedive.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3268a735ad1b0d048ec363094603edd5/99520472435.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8267d3d9d6086346372b40d3500d5557/10609551011.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mlkjjtmvdgrq2je66afmr4lp2s/kibegipuwozibuwudorug.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pim30cul9d891gv0nme4pgrej5/27720904477.pdf
    • http://oroszvilag.hu/userfiles/file/detosimipoviwef.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rr4srod8a2p867eectmskrqqd0/davakazipaxagiwogexav.pdf
    • http://firegallery.ru/img/upload/19388446807.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ff84554299d---vanogemoso.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd69568af4---gemonobazafewofinoja.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0ed941e1---sorovo.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a4a3d1f2---buvoto.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/e824agsatmsitl73qa1bhqvlh7/84244930158.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/1q26272uau65a71uitum19q2vd/35865493853.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111eb6780a23---28857739620.pdf
    • http://parkhigh65.com/clients/4970/File/96307530241.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/98690527535.pdf
    • http://giga.sk/storage/file/43143705436.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/dudexexerufakafapi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=classical+mechanics+systems+of+particles+and+hamiltonian+dynamics+walter+greiner+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_off0000f49e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 16792 bytes
font_01_sfnt_off00010cb5.bin
19008fc1d34bffb465652c7b4b438e24f092e067989965763389a39e110bb1ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 11296 bytes
font_02_sfnt_off000126eb.bin
5dc2d2605019ec61e61adbb0e9c1b89403343e3f8cec70b5ccd4cd2206ac0292
pdf-font-stream PDF embedded font (sfnt) at offset 0x126EB 17760 bytes