Malicious PDF — malware analysis report

Static analysis result for SHA-256 d462af912fad0830…

MALICIOUS

PDF

84.4 KB Created: 2021-06-30 10:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95027ead89c68ef0830805e89a9b563f SHA-1: b4a52bd656407a5ab1789099442973e2ef351cc0 SHA-256: d462af912fad0830352a616e7e009a7f37e96af93420c95c644cdeb17ec518f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories hosting other PDF files. The primary URL, 'https://garglob.ru/uplcv?utm_term=3+letter+words+from+enjoy', suggests a lure related to word games, likely to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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=3+letter+words+from+enjoy
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f55ebccb86---pipujezo.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c626626814---vixewa.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a63c413e63---jizopike.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086852e62e54---55258599100.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/031958722628df1c87c78e6410f04352/lomepizurur.pdf
    • http://arunimaflavours.com/userfiles/file/22298147779.pdf
    • https://sport-jicin.cz/dokumenty/vabujosadomumuzuja.pdf
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/bogovopudakapoz.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/8b20ad600efa6974ef023cf2a8508d12/18673483834.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0cb125d826b40c22e3ef4d2248a05a07/14458125549.pdf
    • https://geneticapanama.com/userfiles/file/74960627015.pdf
    • https://osikovo.eu/webroot/img/content/files/najolotuwaroludi.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607854b907ed9---79153429230.pdf
    • http://apcmagon.com/userfiles/8518686423.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e3e4f1550c28f5d5886a477955c28a4d/34497039382.pdf
    • http://skiflogistics.ru/userfiles/file/pudet.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/c71177e5bd628df05e7b9f0d78e47361/96463801054.pdf
    • http://amuseonline.com/absite/userfiles/file/sokuv.pdf
    • https://condicionamentofisico.com/arquivos/file/82351753135.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5ee921e6d---40201785283.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c90d91649---xuwejebofilifebebe.pdf
    • https://hotelindigha.com/FCKeditor/file/dabapetibefolelubozopije.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c489afe3---bapomo.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_off0000e447.bin
cc199f15ed01c5ae431e985b041c5b04a6214dd2e1d741a6266fb8e80b9d5c3b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE447 10668 bytes
font_01_sfnt_off0000fcd4.bin
377db8c63ad98d0051a3b0eb82c7ffe9b5ee04ef72de92b115a096a685f434b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 17476 bytes
font_02_sfnt_off00012a82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A82 16792 bytes