Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d4426a01a90ea4…

MALICIOUS

PDF

87.1 KB Created: 2021-07-15 23:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bbca6332fa43f872dbc3520bdf68477f SHA-1: b4224f120eea5c1c146bba87f4736fe990bd40e0 SHA-256: 00d4426a01a90ea49672dc940661b5dfe362793d1997fb31db4fbed57a521c49
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF's structure and link farm indicate a likely spearphishing attachment used to distribute further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/7554e1c47821c4863f5fc1012ca5c213/peworananofub.pdf In PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/87735698168.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/5dbe5bed9b9892c8a5ce35ac4f85d02a/zuxovasazosiwelivuxo.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/281211357114.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/270aum5p5i1m1m0dq8722jgvnr/xufenawedesedaku.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/50550256189.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/62196182742.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/minalalogonuz.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6eb06e2cc---58372969311.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/38292344876787a081b5a624eb7badde/vuvonojemanujuzujusav.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2066e2564---gigitaxasogiwijutuz.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608abcd168288---gujilolivurabedojom.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/cnnbeokebtgmn3drhsitmtmojn/zifomalan.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e04c00aaba859945ff465c6c31814258/bemuzilimoxilub.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/xesexaworaw.pdfIn PDF document text
    • https://aspirans.com/files/file/59135470762.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4ffe01720---dojifadalikikilobok.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/98376492836.pdfIn PDF document text
    • http://catgarner.com/clients/873270/File/regonokenebu.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/d25f92c5797d4736b3220ea2735e4765/kozuw.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/buzukuzamesifa.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/vowenadelowapa.pdfIn PDF document text
    • http://lphs-the60s.com/clients/5/5a/5a84a5cabe7f31a06b4bf99f7e1b7ad6/File/zujexafopulesafaj.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/084f6cde8e045a7731aa9ca8aa913989/walofifobesesup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=percy+jackson+3+release+date+moviePDF 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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 11108 bytes
SHA-256: 26ca58febaeff1b4837ba206192a03dc643670636d5427ae7c34e69fb73044a3
font_01_sfnt_off00010868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001207a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207A 17688 bytes
SHA-256: 5343802351435362ff2755a5aa82bfd232b1f86ce8d8ebd42288ab5686670558

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