Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3751035cbbc03ef…

MALICIOUS

PDF

88.1 KB Created: 2021-07-05 09:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff9ce91e623fec706019cdef5d15f763 SHA-1: 0740861c364bb67b8e7ff3d2465f0ba90a42c351 SHA-256: f3751035cbbc03efea42f07ee6d1f259248e1dd0f22d41e7e09bf0fbdcd92ce6
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 high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://wastran.ru/uplcv?utm_term=meat+stuffing+for+turkey
    • https://irantruck.ir/data/file/69251389350.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747d45e639a---fabupu.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/747b25cac952ab40d55490f146ea5432/wixubowa.pdf
    • https://eobliecky.sk/userfiles/file/97517697863.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57aacb81b---zuronabejo.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be74cb924c5---sujajexodelejelu.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/e5a1d7c1b5107d0eca51501453421b7b/xuvodikagawisenawuzijabu.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/5f3d39932bc44b565bd98c266c71f69b/pelukebafirafeb.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/c6f520a32a20f44d5de941095c017351/38579628770.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/a35d2d906afea4ad310ac14539dd8500/noxemo.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/g7u1touqub3mj816507d30kvbs/95256424593.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/73e4176108bc1d76177b454d46f685bb/15681364071.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8fbd6b85b1534c9038174dc2bee6fbc/23397857789.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160baa7e6cdaee---96536682040.pdf
    • http://cezanart.com/userfiles/file/lidipap.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/68535fc2c4462081f15509570a90503e/21408180635.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/si2usunu701mffrjo9j27krbbd/78576850472.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1822e46e6---97400002148.pdf
    • http://baohanhranghm.com/upload/img/files/sodax.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/evnoi1ticn9intftqhtlq1h074/zuroluk.pdf
    • http://appartenvue.net/appart/upload/images/71874327597.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160906fe479f39---sutasumofegudamirubose.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074d3ff2a918---kuninateze.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc4e447fb3---guwiz.pdf
    • http://rheumatology.instituteupload/content/file/mopakezexakasejafub.pdf
    • http://sola-brothers.com/userfiles/file/vepok.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073601d0c03f---47125398796.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_off0000f65b.bin
ef4fe7dac5ae230cbb8c727fa4e23ea1bca9259486cc3486b63ff84a070a27f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 17012 bytes
font_01_sfnt_off0001228c.bin
b6364c092cc1a3ce6fda6522fcb9627d1b2e1c45f8ce08b9a2aa906ae957d75c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1228C 10644 bytes
font_02_sfnt_off00013b1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1F 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.