Malicious PDF — malware analysis report

Static analysis result for SHA-256 35cc925075efafb6…

MALICIOUS

PDF

100.3 KB Created: 2021-06-28 23:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3ddbddf48ad0923147db807859d07fb3 SHA-1: 623744570d196d9147cd7c448984b0841b114209 SHA-256: 35cc925075efafb62cdf5bac6916c5adfc296a9f06a8b87cd452ac9dffde7163
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and the presence of many external links indicate a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ahcxdq.com/uploads/file/181722109809.pdf In PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/b8966d181164cf6c8e6ecaa85f019477/68300811537.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/66756094595.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/xenewesejiwotesole.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/motugamokiz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/81f56f6bff227457283e386e85daadf1/jinumukadajiwoti.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a492289c123---vajoginob.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/16233895256.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/komageruzodukazukagetotu.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/99f3ee73bc991b1f8cb95e9b54bd0642/56901399945.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/sapolisakamonezenuxuwe.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/c44a3b13ddef6ded327f270e2f723bb3/37352271836.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/cd1d609a248ef94073b30c24d78a7532/28078837567.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/19997717870.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/6b9c22b0f3e02105828d04ecb2a3f2a4/navokufofulebogurezikuwim.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/126a049ed5bf87e4295a71f593e8f829/xudanasov.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/40662030505.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c03d53c4dd---99245336491.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/640982942abb29c9ad7005948848368f/kejaxov.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/62acb43bfa6cadaafda07e7897fa121c/45337955131.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/lubajobele.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/mekokagegemepenanixet.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/duwodilo.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/5380c930f343ae7d64dd9cbd10504bd8/36211013746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cutty+sark+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 3200 bytes
SHA-256: 57459444857931addc41ffd5c27a46df6b0cc764e36dc0ef86763a1a7f53d63b
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 10620 bytes
SHA-256: 03262be276f11a2436adccbe44dbe25c161c5eac6735c6c3521de86908339217
font_02_sfnt_off00011625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11625 16940 bytes
SHA-256: c53bcbd87bfe08a704c2be01f5c68203e254d84e175926d68f9188c4192506d3
font_03_sfnt_off00012eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEE 23392 bytes
SHA-256: d749e2bf87a3bda7844b997a563dd73165804b55a7fc0455410e202457a9372d
font_04_sfnt_off0001696d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1696D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.