Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd2b4756dca9e68…

MALICIOUS

PDF

85.6 KB Created: 2021-09-02 15:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d946e220c9517f39f819155d6759e5c SHA-1: 8ad89c44ebce79becb6481bc794cfa8289834620 SHA-256: ecd2b4756dca9e68b90bcf338a9b31fe6f893b7aad0ef3afe9cfec7d861945e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to external resources. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://garglob.ru/uplcv?utm_term=chevrolet+tahoe+2017+manual PDF link annotation
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160979cbbeeedb---73931302968.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/96855369977.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/37073913375.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfc3210bb1---84942051697.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/kapozem.pdfIn PDF document text
    • https://vleek.com/uploads/files/begozusoride.pdfIn PDF document text
    • http://www.moyekolodin.com/files/23394455188.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/faledowupusogugawedu.pdfIn PDF document text
    • https://classicandcamper.co.uk/wp-content/plugins/super-forms/uploads/php/files/ithph511l043ah3e7b88lmghqi/60242322980.pdfIn PDF document text
    • https://wita.lt/images/files/89395256310.pdfIn PDF document text
    • http://mylodge-naoshima.com/79455294744.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24eab5bb44---28144289696.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/gekosozowopipupibujirut.pdfIn PDF document text
    • http://yoron.net/up/files/21116672377.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/fowixavanojak.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/01ab3614817ad13893ef78e20e14a146/55703204671.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/4eavs8e91tqoat0m0mak550lf8/74302188449.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/b89206bb6a4d4564bfe14bbafe0b19b6/zunezonekogilalugogifoto.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5944ce9b8---59152853804.pdfIn PDF document text
    • http://riversedgefm.com/files/file/98298754785.pdfIn PDF document text
    • http://donghotam.com/luutru/files/98171851174.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d99423b7de9---10145820423.pdfIn PDF document text
    • http://nenorm.com/files/files/zetojuduxotusa.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/29821643977.pdfIn PDF document text
    • https://vayoto.vn/userfiles/file/52937678570.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_off0000e4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E0 10656 bytes
SHA-256: a0a023c9ef1ecd18c0a4d6967c42c68f3ebd51d6fad410ac3f3abc94af05b8b0
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11561 19588 bytes
SHA-256: a4aa44c1039a7e4675da204660da259290067f093c6a435737ce789c86048104

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