Malicious PDF — malware analysis report

Static analysis result for SHA-256 006d768811a551de…

MALICIOUS

PDF

101.6 KB Created: 2021-07-17 02:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7dc2f883ab0be85a994293077f7792d8 SHA-1: 55901a3532412ccfaf891da4dd876f837004e823 SHA-256: 006d768811a551de8452c39bf6d39e455ebd511edb76b87875a558a3f3beff41
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm. Notably, some links point to compromised WordPress upload storage, suggesting a potential distribution point for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://pileshoppen.dk/userfiles/file/35831904230.pdf In PDF document text
    • http://www.peretprod.ro/content-images/file/75187794350.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafed3d7fc---vuzijowusogojimemu.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04d0e33ca4---10879212624.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/manefatedalujuwegapin.pdfIn PDF document text
    • https://mfdesign.hu/files/file/xudutuvesovegi.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c45c77f0d---lolamir.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/sozeguru.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/69987617587.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/roxezutu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d8991de3---gixajamakijosujikiwak.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160dd73c1abd6a---zuzuzuzezapitekawakeji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ce585caeb---zukulotogagoxuruwokex.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/vawezepevibemidutuzux.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/83ipt10r1cq19nrfn50ketuifk/duzap.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/pixajixanarufu.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rebesr975ait2nvv0fusfqjev6/35980128812.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a042c30bbfe---63116461518.pdfIn PDF document text
    • https://actorconseil.com/files/file/vovopaxeka.pdfIn PDF document text
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/fogawaliwipoda.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/2u3bmmcnof1ekqa3jlj94iu3q2/jizip.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/lixowobogexewuzek.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/jomomutisazopal.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801101368f0---22667106609.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968f80d968b---25881131198.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099a54ad7a08---86272276660.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=current+affairs+book+for+css+2019+pdfPDF 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_off00012286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12286 19720 bytes
SHA-256: 2b759c2ce16a6749aa8668ed77066288d4daca7bc9ef4e0b22b15d06cec4133d
font_01_sfnt_off000155df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DF 11392 bytes
SHA-256: 7d5806d72650f1009b5275da82b734db4f6418e6f3e6d6f41c49edf17c16518a
font_02_sfnt_off000170c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1