Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ddda21756c6110…

MALICIOUS

PDF

113.7 KB Created: 2021-06-26 02:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3e1c096a404a299b8806e57606fd0953 SHA-1: 6f2050a0f702fa07561f8abc86917d353f1404f4 SHA-256: 22ddda21756c61100bcda3f194efe2a6e0ca11c78b66128d1e991dca27683c7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised CMS upload locations and disposable domains, likely to host further malicious content or phishing pages. No scripts were extracted, but the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://meble-tk.pl/userfiles/file/kufazexatijal.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/202hmnu9d8olk2q61002jrk57b/34045104515.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/72962559738.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/aqlsuvlko2k3l0mun4k4jt66nn/78628653048.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/80421635333.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0a194a1b4c488585f7861eacdac8571c/37102580986.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/8561b94d844e77c45056d46618520286/pimop.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b24ea5cb18---69490643340.pdfIn PDF document text
    • http://berbun.com/user_img/file/tozitipixepiwuwekefopesu.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/f0fc47d06ed191a7ee1dcc0815d1cdae/sezufokifewasorifalar.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded536737e---66842296789.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b1226f98534---ladedogusatarojuvisoze.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607191f692819---gizilegolufikekalenebi.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/07051d7fb61d8cf6873cb6c2e93d1407/53968563284.pdfIn PDF document text
    • http://saptpadi.com/files/file/fugetor.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9192288ee1---98084041506.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/22040368770.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/gokisufo.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/4088109592.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/m2t6soi8mct93r5f8des7uekh6/36179802805.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7jjbh65120fdd52dijsfvp5iu4/35637248680.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/dodoxubosopuvikinenaf.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076c834e9d64---70990687500.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/zowuxaweg.pdfIn PDF document text
    • http://www.centralperdana.com/file/31217214797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=all+the+apostlesPDF 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_off00013d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15548 17180 bytes
SHA-256: 20401ba5687a49f3078f8b4b5a1fbeb8262db9414af7569e8827b079398f047f
font_02_sfnt_off00016f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F11 10032 bytes
SHA-256: 013e833f15efa3c05873c422c2d1ea7c58e07e435ff486d9c7ac9ff10349eed7
font_03_sfnt_off00018591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18591 19880 bytes
SHA-256: 4ea9443c85e4f2394ef156e2aaff73599f3032a1febf9162bba6b600b2006afa

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