Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3366c0a76beabd…

MALICIOUS

PDF

93.5 KB Created: 2021-07-23 01:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: baff5539e5bbd1bc0dac3f6d9f4d885f SHA-1: a851278da3afdfcf9b90b58bbe03d487ada1ef75 SHA-256: 5d3366c0a76beabd5d71271160b3ada25f0894c61db9c72518a79177b1db7a48
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The document body is unreadable, but the heuristics indicate a deceptive structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e33a00a3414---80379181929.pdf In PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0c0b5c5f9b4faa1f0536a0a1e075af4f/zodufetonuduvux.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/98033245913.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a990b516ecde4f786bc7e75f9e1c6cb7/lodinipafilizabumiki.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/loxugoxunikadagizesodos.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/ipp8b39kbiaica35vm46rc5tit/faxutofiwovuw.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6981e1bd8---bafoj.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/mhrr1enbip62hnc6doq4d7ag74/mosanolemata.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ecaca7e8473---zokijinapumejezito.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/gosugi.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/lv98ubc1oqlv9c1j92sdgq7ijn/90241755037.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/niweputigefelifidizud.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c79bb627775---70076610155.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1ea60444be35873c17837eda87e51bea/sidewexekirixixoroxijap.pdfIn PDF document text
    • https://armandofalconi.net/userfiles/file/53801459395.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f3be7f2bf---xodavok.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/ujnb1lro0j1v3292jg3ko0139p/97885337460.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/rajida.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608857629237b---vadelakuraguwiman.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/74880358358.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/177cf9f6d4c5d3653774a59ade333658/goguvajusagogumupopazad.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/63582237606.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/vewexiz.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/7dd2ed200143ef580460dcdb67fe7800/zotumekinotofijafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+long+do+you+need+to+study+to+become+a+lawyerPDF link annotation
    • 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_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 11052 bytes
SHA-256: 0591bf21d33c818d97dbe8424f7dacb1dad4c666a9a95f86526baf5986f8a287
font_01_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 16948 bytes
SHA-256: 7e394d30a7e9c832f47dfef5ccfcd00d02372412928eb6dc6e03e2d837da0eac
font_02_sfnt_off00014ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1