Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e30679fd16553e0…

MALICIOUS

PDF

135.7 KB Created: 2021-06-27 21:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70d5b496c3e7e2c9da3e5a362af214fe SHA-1: 29835e39f20b8809b86246f3109a840566d15f8a SHA-256: 1e30679fd16553e01d631175b0c76b619749defdf12191cc5932f685c7dff39c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of numerous external links and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d0c0b8c65de32e1c641506498147a8df/89676597220.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607263e5c0a2c---43858642516.pdf
    • http://ranaghatpchsschool.org/userfiles/file/webam.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/eae10351ceeabbba878b3e9caa5cfd7a/1726099743.pdf
    • http://polloricowings.com/uploads/files/vibezegog.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/4rd6anusd70a6rvonk39b8tqgv/80104480013.pdf
    • http://jhferry.com/data/fckeditor/file///dezirigokoxezubiwajedibi.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/8cecab48fd68a318c64f77faf2ea1a52/noratilexurew.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ffee314d9---limowupaxapibezoze.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079510967ae7---gutenigonuzo.pdf
    • http://csc0532.com/userfiles/file/20210621035703_nijxf1.pdf
    • http://riccaassociati.eu/userfiles/files/dixoxulaki.pdf
    • http://jcon-aps.dk/userfiles/file/fujoduvefenodasolowubatud.pdf
    • https://bczenekar.hu/files/file/tejuwegarukovut.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/pilifa.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/d48cdf2e63589c63a6c36d539b5206a0/pebadajoz.pdf
    • http://veronikavilla.hu/userfiles/file/48596745896.pdf
    • http://dunajecbiala.pl/upload/File/25742941825.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a12abdc68df---21436201794.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/013d66f23f3fc44f4b13d66314c1a8c3/kerupix.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f374948b8d---87026593026.pdf
    • http://banlinhkienlaptop.com/userfiles/file/65022134137.pdf
    • http://lucann.com/Upload/file/20732426039.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/e7a81a9ef3dc47e6fcedbdd743b33f7d/90344107309.pdf
    • http://dpsszczytno.pl/photo/file/97692824990.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=words+to+the+wise+a+practical+guide+to+the+esoteric+sciences+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_off0001acf0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACF0 16792 bytes
font_01_sfnt_off0001c507.bin
1addf63edd4e1d06f0eb4bd9ebde3a2c5ec94a8481f5f3719cf2da6943e8c707
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C507 11080 bytes
font_02_sfnt_off0001dea1.bin
85b9f2bf6073280928b9206d41f01c3f9b9aa35e3820953e41fbcb0c2c1c50de
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEA1 18880 bytes