Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbeb3fdb4473595…

MALICIOUS

PDF

73.7 KB Created: 2021-09-06 12:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 04734e2bd435dfb402ded4abcd92b68c SHA-1: e6ee0c5d1d9da7ad2a53b4fcd39e1d9b6963a555 SHA-256: 1dbeb3fdb44735958118c24c5d3fec7f0e4d429ad3e2324c2a31418fdc102a2e
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://at2apigroup3.com/contents//files/4119840425.pdf In PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607908fbd4821---10930891746.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc60811cad---dolofufenasagipux.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161169fc601252---pobal.pdfIn PDF document text
    • https://termoformat.md/img/files/91511626340.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/93524753987.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/fekimowadez.pdfIn PDF document text
    • http://totoumi.jp/upload/file/xaxovodopividizazesiripu.pdfIn PDF document text
    • http://888chji.com/userfiles/files/15304172413.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/zekalamemamar.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/16617870654.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/75510005930.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/59709320669.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0ccb8f89b---40323326467.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/80331831717.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/lotoj.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/1tj2lmgkr6k2bsbid1dhuotgo2/19625590576.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/1225536487.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/xenedid.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610c3cc08f2dc---gafitov.pdfIn PDF document text
    • http://aimic.com/userfiles/file/kurewerisinapafipogenedi.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/9kpbttgvetnmn9jaecinbabieh/63590178279.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/sefavudamep.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/stkcr65fet500455525atrs4p4/famimorelapawuzifonav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=unit+rates+worksheets+grade+6PDF 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_off0000bed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED5 10832 bytes
SHA-256: 65760f53b5617aaa638009ef8a903a90a5ae973d7a452bdc9310f654db10bc0f
font_01_sfnt_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 16148 bytes
SHA-256: 8141bf432f3ad0af86e05cc630a47152258236c7d831de3989a3d40ef677654a
font_02_sfnt_off00010171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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