Malicious PDF — malware analysis report

Static analysis result for SHA-256 afddadcc80e07035…

MALICIOUS

PDF

95.0 KB Created: 2021-09-04 08:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 403b4c9db4bd64d771d395ca0fa6fdf9 SHA-1: d65dbd9416a74f09dd8ae68013f628497dc0a1d3 SHA-256: afddadcc80e07035e74b23921bbad49b1ab8c288313f4b738546f8b995fa6697
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload locations and disposable hosting sites. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://textosolutionslinguistiques.ca/upload/editor/file/72634961578.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc5fa9a690---41060503287.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/71486140291.pdfIn PDF document text
    • http://taniaandjohn.com/clients/874109/File/bewivano.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/zokezasekurul.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/furolexu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9c5b06fe2---tedewa.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/75165790753.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/xifufilaxinuvib.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3286f679a75a799a9370bc2171ed2a62/subofawaxopemidid.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/biroferupiju.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210728/file/1627404319.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/83977736332.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ni16l7po49apm9a8140savqpvc/tidutamasavalagexa.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/492625b6228c1938a49590195a356154/63097951054.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/61516035918.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/19364500024.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/2e00dbcd0ba6ad5dd798d0b87aea00bf/66855737079.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/tebiga.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ace3e43ac4---36316837286.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/74eb7c91a14673e320486063358f8bfd/68602229789.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/jarugakenemar.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/zimawuwuzobojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=spring+framework+book+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F57 17760 bytes
SHA-256: 33a114045007528833bba1662f19d33703ef43243102c14305a678e9007db50b
font_01_sfnt_off00013d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15572 10920 bytes
SHA-256: 4f0ca487ca6010eba1c41a65899c6b3c585f0aaed61314b59c18eaf85ff0b1fe

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