Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec21e7a06cd34bc…

MALICIOUS

PDF

115.0 KB Created: 2021-06-28 19:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2a3d258d26321a9fa820b65271ce791 SHA-1: 2fcb01851a57ed067875a00a704426dd115b4c6c SHA-256: 9ec21e7a06cd34bc5482876c34c10b0cedb423b7d4a88c98cf19688978e7dd43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ML classifiers and ClamAV, likely a phishing or link farm lure. It contains numerous embedded URLs pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://www.alexgis.com/siteuploads/editorimg/file/vixodeguzoxezegef.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/77ed8357ed8b179fd2e8de678e85a24f/timosuxaridopibix.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c24a41b9c7---wunepat.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/728945c1b3547a1c6f0f86e871385f5f/vegugexijag.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/10c698d30386653cf4fef5c3261c09e2/53467479749.pdf
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/jajimudeluf.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfd7234288---82261616180.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdc61910a3---zifipasoruliz.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/4851e607ebe2d03c68070bb646d4fde4/39511063685.pdf
    • https://thietbidienmanhcuong.com/upload/files/kesugudexuzafej.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a0144c145---65892420829.pdf
    • https://tyko.pl/userfiles/file/52853829430.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160885b0292efd---58394397935.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a08113f0d8102a830d126c6f01099235/mopijajoketamuwuripaf.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f784e1db---fanunez.pdf
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/vasazesagizezubejuneji.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/208e18668ad9a212476022fba74e5c75/25389151676.pdf
    • http://medi-sen.com/files/files/45989793774.pdf
    • http://booklandbooks.com/userfiles/file/susovitebupiladuz.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/cvebuvdt1s6iq4nmafcdd8c5j5/fisimaxomimimakobawor.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077001ed3068---digodesuxemagumopogi.pdf
    • https://abe-rdc.com/userfiles/file/jizilenusutawosaxurakix.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/46af51570d6398201fb92ca073b8bd6f/buwakenunuvegufazof.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094587590c17---47469212903.pdf
    • http://yesilderecine.com/admin/editor_resim/file/51896425318.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=leptin+and+weight+loss+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015cd9.bin
9cb549e6226e7a2526d187b9680e5782220b5a03aa5dd4c507fcef1f0d44c9ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD9 19124 bytes
font_01_sfnt_off00018e76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E76 16792 bytes
font_02_sfnt_off0001a68d.bin
5fa3a1b43c84d681d40e02c000f6a83679b36e10b1eb2a1113c548588ca2c3a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A68D 10720 bytes