Malicious PDF — malware analysis report

Static analysis result for SHA-256 065ffd20bac3517d…

MALICIOUS

PDF

103.1 KB Created: 2021-07-03 11:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 789110847388c86f425e1beb3bba0827 SHA-1: d4250a4c75ce0e949524b72d9c316b47d58b8641 SHA-256: 065ffd20bac3517d381404f04b2a48d3c8779d47917835e2f1e40940bdbe245b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://hzzxtl.com/UploadFile/file/20210620180502314.pdf In PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0489367940---41958965846.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb4e967fbc---potanituzurukaxesovala.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/lejivopatumusopuninuzub.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/janigufunipuvasideje.pdfIn PDF document text
    • http://hotstamping.pl/files/file/83358186907.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210615213759.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/sedemowozusofopixebono.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/25927e5688240ec74320d5eea28ea118/7958752110.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8353dad85---73144417255.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/efato8e2va561fnbdv5112g1n8/xiredurododoriwimosaboni.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/aea2c558a3f81b18f87df58ac8859fd3/60926755207.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/e3d4gn9k9sgn6o3155c3nbkqj5/49333553612.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/ee2079c43bf5a99f11642d5bce323f27/fijagafalonuna.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eed6f55500---50811159603.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a278c7459e9---girudaveb.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da27d51f850---42481221697.pdfIn PDF document text
    • https://mauspro.net/upload/files/37535438717.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c486eed67b---durijanetovavuvagabas.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/18c98e3e30d478d25063d0fbffb549c4/bitutorosibewewir.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/atn90vmhfc8qjqb7m2olprfndg/pajemorixujubuzudos.pdfIn PDF document text
    • http://egonseetour.com/FileData/ckfinder/files/20210616_2753CEC0D1925E8F.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa7f0a58bf---kulat.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/93747160445.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24a6f28560---kezilodimez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=all+types+of+werewolvesPDF 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_off00012d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D70 10240 bytes
SHA-256: 53debb914cc0b416dc8fee216761b6b8c9b012ffbf0c7817b3863ceab579fe5d
font_01_sfnt_off000144bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCD 19788 bytes
SHA-256: 0eb52c0dc4ee872fbb11fec6cc420d042af1334a1f3baae1dac00e59ed1e99c4

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