Malicious PDF — malware analysis report

Static analysis result for SHA-256 6affb8086b37f425…

MALICIOUS

PDF

129.2 KB Created: 2021-07-01 11:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0c71b349cd2a8a1685b7d5760775df6d SHA-1: 6fa4b2b1ef3a659649933cfb10fa45e2a5027065 SHA-256: 6affb8086b37f4250241275047eda01685c0389e17b9fe24fff5ccfa99e4da55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the heuristic firings point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f0feb170a---lekewumoziroribe.pdf In PDF document text
    • http://plafondchauffant.fr//img/user/file/kujajuwosewi.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/38462665430.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9f4263ec4b3360ca2e8f3db2769a2750/38602375760.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b61736253---83137619265.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/boriredemularagotimo.pdfIn PDF document text
    • http://crabber81reunion.com/clients/b/b6/b60cf3d631ff247311937b5f15bedc89/File/66288242161.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/bd98e7bbef463ea11de1f93692ebd827/zasireluxi.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/sademebawizij.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b46eaa97c0---bemujiwirulibafimopafaso.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/iemaikp152kqatp09iof3dh1c5/39626867772.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/3233264831.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1c9539e7---85868158618.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef424c779a---fivuxurezegu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cjjundnvcnfilu2s1s9oud0nl9/64263993599.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b609ca95b---89057043366.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8e75d8475---57627610646.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/13730426919.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdeb7e07130---54406900366.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/wimajozugoregapabakak.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/60172678431.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/5c6245c8da3abaf0dfd96a5c4d3482a0/gafavip.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/03597040460ea46e636d38b1d2e4c9f3/kitagafe.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/tivedetatiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+you+change+the+header+on+each+page+in+wordPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c6379edf51756ba265b56696cebde17d/fanifipafiboji.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196BD 10872 bytes
SHA-256: 347c3eef448ae40c7a9794bfb015ed450997052320d3760daaf2ec10374da0a5
font_01_sfnt_off0001af9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF9C 17664 bytes
SHA-256: ada0650ffac5ec27e4b456448f8bc78c6bff67265d1da9ae224140a9dae89e18
font_02_sfnt_off0001de4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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