Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d56434fc918b3e…

MALICIOUS

PDF

101.0 KB Created: 2021-06-25 19:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fecbe3044886f67f06d243f927e8524b SHA-1: 3cd1d8a29489fbad1e990780f00c9518edadbe9d SHA-256: d7d56434fc918b3e72bb2590821c28701bf47c368bc3e6df124cceb94918a57b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://benardoutlite.com/admin/fckeditor/fckdata/file/57380199430.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2c6blnrtl1khbj43b5g59kue04/42714853832.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/mkv2c4n3hv8svm9ouroibq0jcr/sodigibobemibivelobiv.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/0mvgelb3fs3pio70q6fpc03dr9/14148445212.pdf
    • http://aimic.com/userfiles/file/75112982802.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/2f3bc2d03e94cbb96d2acab91377cc91/xowevugibomikomakoxeboket.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5c1662fc---musipivubipexuvatobiwos.pdf
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/75765583086.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/abe536a80a57de3c414f10c375433e8b/nigumakodatoji.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b74c19028---34004755419.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/b6f04a82ad28b1d7f24c38e05f5dc4cd/1278231971.pdf
    • https://espiber.cl/images/uploadedimages/file/75131930245.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ff94cf6c3---siliguzujiv.pdf
    • http://c2ctrading.org/cms_upload/files/5854740023.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/bgdpe17qvib5p2k80frm6osgd7/54552489653.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f16bb8ef3---dasuzubirokakoris.pdf
    • http://wxeina.com/userfiles/files/gariwitogezemivanofuva.pdf
    • http://reclameindex.nl/images/uploads/ragoguk.pdf
    • http://opusincertum.it/userfiles/files/38695615455.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/45617f8d35bc10fec6e9933c6a6ba97e/getudizawezagewonita.pdf
    • http://animalscipublisher.com/files/upfiles/file/1042937093.pdf
    • http://lapenya.cat/imgjovesnaves/file/31767627896.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a4aec61a604b3714ffffd9862d683d68/80270221987.pdf
    • http://www.bluewhaleline.com/image/upload/File/xoxiforalixopelosak.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960fa875385---15430419989.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/a3l7ivitjlvq568o7er77p7qu0/xugirijofa.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077d066e0566---58917827724.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=to+assume+airs
    • 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_off000129e0.bin
922958c7a4b66adf727bff9bded02ae108eddfe9185721d367e3845b4ed1bd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 10084 bytes
font_01_sfnt_off00014059.bin
6e207efa7bd44fb4206e2c9c1fbf0c42d81c37368b9cb546d95f63288dd8d93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14059 17600 bytes
font_02_sfnt_off00016ead.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EAD 16792 bytes

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