Malicious PDF — malware analysis report

Static analysis result for SHA-256 984777669d640144…

MALICIOUS

PDF

96.5 KB Created: 2021-07-14 02:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 58eb4bc62962791c026830319e538417 SHA-1: 9970a641cd70caca77a959791353d298d2ad2a28 SHA-256: 984777669d640144a0a439ed145f8489155179368b0b5f48f98cb7d718eb8534
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=meaning+of+porphyry PDF link annotation
    • http://hagelkonzept.de/userfiles/file/sabutexebilasi.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/52604564070.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/569c94597fc7ef4ac2c74cf9d0faf7a3/88095897181.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/40320691571.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/61622346104.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf59f27f24---bopugazawujite.pdfIn PDF document text
    • http://pvvc.cz/files/22292979475.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/gdpleh6487o9hm47dvc6ole123/lepowunivunixuzerapulu.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/94424482465.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dcd7bf01cb3191051d19472d07635d81/gedevolineku.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/luzoxolamose.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/dazoxoxopag.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/287399435.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/55302565744.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/rud0v9igjf5nc4d9o56ss821uo/mevigube.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070db019d4bd---lobugudinuvosizur.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e2b7d6f6f241982603c5963300e36fb7/vekoganoworugerozox.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/987b89a85d3aa7dcb58e30df23ffaea5/44131615344.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/rapafig.pdfIn PDF document text
    • https://irrisyst.eu/files/file/xasikopiwesen.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070f80ecdbfc---dinizodali.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b54f1da79a8---67707925620.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/7272050948.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a10a89617---88101024877.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 10432 bytes
SHA-256: 321da60789d540bc1c90f1607f17929e0738dba07a0169ff13d4cf26bcccc882
font_02_sfnt_off00011a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A41 21572 bytes
SHA-256: 29da548a6671d93dd6360184dfd8cb3da8552737c708751a0e73d2accc9746e4
font_03_sfnt_off00015125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15125 1972 bytes
SHA-256: b76ebc5759535bf0a33f958044f6e92504b2a41ab44042534c5a427ce2b48aaa
font_04_sfnt_off00015a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A2B 16784 bytes
SHA-256: 99d3f3e964967ff0aede5f0f14416f40fb3c3cd0517f17038abfe11bf44ba620

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