Malicious PDF — malware analysis report

Static analysis result for SHA-256 701d1a0f794b8fd8…

MALICIOUS

PDF

74.0 KB Created: 2021-09-08 08:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0882da870191c3e80fbfa0629f27f1db SHA-1: a83d039987a1565be6194fa0b36f1ffe7a65347b SHA-256: 701d1a0f794b8fd82e64e2d096cf09b0ce8a5e241ca33c65da48f5e792312fee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further indicates a malicious intent to host or distribute further payloads. No scripts were extracted from this sample, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=the+jungle+book+pdf+with+pictures PDF link annotation
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d90f67e505---56910072363.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080b550086c9---tijiturovivupixodixitozo.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/zakosudepetaxanifu.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/94131140937.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/52209215431.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/dovotima.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/pakozetalizubobadosidor.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bec4060c2c1---muvinikijakikexilexelinuz.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/v2tpd1s1dikjon5uqi5vdhso10/xitozari.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/oes619i97it9etj22gtoqoslo0/47806549183.pdfIn PDF document text
    • http://ccsl.asia/files/19253273703.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611718f8d0b69---wofiwotijovetevuvite.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/romobesesu.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/31286380787.pdfIn PDF document text
    • http://esteel.my/userfiles/file/3906464057.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/u6tjnan4c46a94r480c3ju0vu0/pinejiju.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ba9fe778de---36100885481.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a38231dd5a0---99787766228.pdfIn PDF document text
    • http://fructusartis.com/i/File/fonoreluruxijepulaled.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/37695496347.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/muxubo.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/puziwixeluzilado.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/8899469474.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/99153005169.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16075d388cb933---44194293562.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBE 11248 bytes
SHA-256: a31f022e0187a7708d43a112667bb1692f0a5d7acfac2afcc39ad9cca7165bd4
font_01_sfnt_off0000d7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A1 16588 bytes
SHA-256: d20a73ed82c0641906236ebeb19e3ef0cb2686cb2ce15ed0249448391fe72851
font_02_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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