Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72707224be9f278…

MALICIOUS

PDF

103.7 KB Created: 2021-07-08 05:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11a3593cbcb81a2696f7fdc24890dfb8 SHA-1: 77eb86f1f40bb388bbeae3cb839e5907f7cecea2 SHA-256: f72707224be9f27840bdce9053c2c066f6fdb815fb595a62ce7af6a46d2f1bb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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 http://asja-doll.ru/userfiles/file/wivokadurenugirapa.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3067bb74b---firovidukena.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/50905953b3c4fe5e4c8717823e9ac028/58605833013.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/810cd52e6b4148612001788f3a7cdcec/xibivawefefale.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/33e6f798da040b9f122e9a446284b825/wogeni.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/af8762f1eb44fe81100f1dbc36cce692/41717380268.pdf
    • http://arunimaflavours.com/userfiles/file/53830858543.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e906c33374---gorovajudajo.pdf
    • http://scandirent-new.ru/uploads/assets/file/41418191885.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160acab3262568---jafirevixapumib.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/15451764860e1882267c33.pdf
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/wikiwusuzelerobep.pdf
    • http://kamnitikamini.si/upload/files/70708978326.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a612de5d82---veworijotasulabokuk.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/002oot2chfd42n8ovr47q9o8k4/dazamiwezosapedepa.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c67226e9196d31fd8eefc58079a7f514/42709156313.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdab38ab749---jorig.pdf
    • http://rubensova16.cz/files/file/22567282697.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/km1e5so55iq1k4l8e0vr0qge5c/defupuxezojuzilig.pdf
    • http://americanewbie.com/userfiles/file/28160469430.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b02025804---35784970183.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/1a1bee23b00ec0ddab7e136a60e1d516/pikolijepokajepakaka.pdf
    • https://osakadentalcare.com/contents//files/pakukabavap.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585c4a4cb7---ponusexametori.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d8f336683a83349aeb7c581c78e2f3a/tufoxitakuronafenorulaf.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/rhd8ihhjdo8e7b5evinfb15v85/41235408359.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=d%26d+character+creation+for+beginners
    • 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_off00013298.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13298 16792 bytes
font_01_sfnt_off00014aaa.bin
d0c682b4ee869d9392fd833e224af250ec704f3df7ccf6cbfe6ec1937ca39ca8
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAA 19884 bytes
font_02_sfnt_off00017dca.bin
f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x17DCA 9076 bytes