Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c1667340ccd5e9…

MALICIOUS

PDF

90.2 KB Created: 2021-07-22 08:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b460d8451de3dd69190ee418336e379 SHA-1: 489941f9a6ceed20b591599dacf5a908999d44b8 SHA-256: d0c1667340ccd5e9a92f99b0cf6e40b650cab7c1ad1584d2cf166647000d5fbe
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://goref.ru/files/file/69585765468.pdf In PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c50823438---lutudobepujajelobosuf.pdfIn PDF document text
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/59274221646.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/be784d4c62b4dedde1dc70cbc9d19267/potagiro.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/fawekuvudozojut.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/86ed73ef259b490179cc55d7a7e0024c/fatoxubavog.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f8ik3m3vlsplkfv16e3tr5ml9d/veniwin.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/42634141a24cfb198bdf6f1f3577cb68/37736396521.pdfIn PDF document text
    • http://chinalabware.es/d/files/43976119919.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5c8d794d601d08e8ee46c8dac4e3ae64/79899146930.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/frcbn9kajvf8dpmsnft6qiuhh2/pojurexovosupafib.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/pugokinexogeragawafajuk.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e9350ab8a---71947628952.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/13282318382.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/l4bo6o18pkcobc2mge3r3ies69/77219549692.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/tumatodagaralo.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/00d07bcc910cbe930d4ec2508d6d4f07/88981316274.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/51500094419.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/duxokikepex.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/bapenolato.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/5e3623d8a51702c9af8e303466d748f0/78222999371.pdfIn PDF document text
    • http://stringpoets.com/userfiles/file/xidifonu.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/lasutotomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=surah+yaseen+colour+codedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE679 10564 bytes
SHA-256: 11b6011922749db42eab1f6f06481d2df6da8005d8c9aa7a9b72eda554eabc7f
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 16224 bytes
SHA-256: dc06733fb1b3e8baa4303a7b234726769048d67753183ec25fed266cd0fe6b8d
font_02_sfnt_off00011447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 17708 bytes
SHA-256: 983377446a4cec97a8ef2cae2d431cc077eb556291ca6601503b7466576a4753

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