Malicious PDF — malware analysis report

Static analysis result for SHA-256 babc7de4f1fa0940…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 21:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4582f3fb19911ac221deee33a1f30a40 SHA-1: 34706dd2c0db967fbab5437cb223b87d1a96adce SHA-256: babc7de4f1fa0940dceaf2a38b72a1825a5c138fd7a753fd8da46df2b69c1754
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cructi.ru/uplcv?utm_term=camera+nikon+d90+manual PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161209f02849a2---29335057099.pdfIn PDF document text
    • http://ipublicity.cz/data/file/87076732249.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/310c4ca2d0372b88f8a02c024a6994ce/34854442135.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/gizudawiz.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/bovinufarugamamejo.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210710_60CA465D5E2F6F33.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/42646280784.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/sijaba.pdfIn PDF document text
    • http://aimic.com/userfiles/file/59200129375.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/wazokuzesifexoxumib.pdfIn PDF document text
    • http://www.520amis.com/upload/files/40648916290.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/wokasidojakejozesu.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/dce24a1ed5c2c1357a2db46832007112/72342036817.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/zepubipurovufolikegiwa.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c2ea12d00---52039407082.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127173a26404---38609158972.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/25ac62b64253f2a6d5781a19c5f89734/20910058981.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607511be58a87---miwazavoruwun.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/newekar.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd32b0edfa---24520804655.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/kekifirazidexevulaxewixe.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d1ec6ed824abb7771dae55c33f75d124/16445560312.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/bowulipupa.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a8d89617---zovepefasutexijozi.pdfIn PDF document text
    • https://le27.fr/docs/file/39156469431.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_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 10656 bytes
SHA-256: e2c32728481ce024a2e37efdf44de27cac2b812138069c125907063bd6819e9c
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 17832 bytes
SHA-256: 87469deb71c5b99c209855be5add81e064d8131a3a50808ad9ea54fd1e2af045

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