Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf214442d8bff141…

MALICIOUS

PDF

85.2 KB Created: 2021-07-30 06:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7be8a454e55f3e8d9453cd1e7eec51a1 SHA-1: 0b672d64a74d8f4ebc4831c4fcd8cdb4d9deb1c8 SHA-256: cf214442d8bff141336197190fb7d9fc0a2b799f438a2a2e5b7ac6df9ad134e2
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites or disposable domains. The primary purpose appears to be luring victims to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://garglob.ru/uplcv?utm_term=ptv+sports+official+live+streaming+youtube PDF link annotation
    • http://cachnhietwin.com/luutru/files/vologosuxebuju.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/vesivepavuxu.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/33255137772.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/db97d8d652e12a56c8fd5db3c86143fd/sonolelafezorade.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/ramelubopomerobeb.pdfIn PDF document text
    • https://yuss.itfile/gavobunujowemumemu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/b918ef81856410a348f1b96b23139da6/28149797265.pdfIn PDF document text
    • https://ckmandarin.com/uploads/24743115444.pdfIn PDF document text
    • http://kasargod.net/uploads/file/gabesizarimifokak.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7f0dfa96---69943351716.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/35043556496.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/82025969394.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/74684628343.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/40242768186.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/sogat.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/780409c3ecbe5d239a897da6eb4776f3/95249877075.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/rawiladu.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/97367582109.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/124857d76e233e4534f2c2c7f001d8ed/173375315.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/10cb4d452a720b30f28ed228535b73a3/79663763811.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/kagisutuxefer.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/vivujozonevejetinuxa.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/e9190afa3ec42a16bf95f7f483ac805f/63264755340.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_off0000e83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83A 16748 bytes
SHA-256: 5cce267afc0ab3ad0c5dd49036ea690673c605cd136ccf16de78c8a19ef24528
font_01_sfnt_off000113e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFF 11244 bytes
SHA-256: 187b2d14df5bc7ef4e5a9daaba45999da59ce715d9cdf32ffde83097f74e540a

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