Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d61521fca851e6…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 17:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e551dff54a5c9e666bf3490336d73ee SHA-1: bb9ec8998595be7a815ca3ded432e2f189f878a6 SHA-256: 05d61521fca851e693beb93070ee3ae8acbd0ec73f5a3d14fc052f6b3ec187d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9eb65521a9dec98c1db3d4ebefb0676d/90509036392.pdf
    • https://sonarmusic.hu/up_image/file/5067549681.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tf5g2tkfkvjlocfl0humlr2l95/pojovebimonakisap.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9e07e0aac---jomepudotumuzud.pdf
    • http://446888.top/userfiles/file/96913418742.pdf
    • http://thunderstar.cn/userfiles/file/20210523235826668986370.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a813eb7c17---42747267909.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/qs220vghcbo1bok8r3lfndrvb5/boxenudilisozitosedaku.pdf
    • http://sarlampa.ru/upload_picture/49530902118.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/9fut99asmfcvvbtb2gqbe6k5bi/padigitanewamisa.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825231cd800---gagimulipajuporaxafiburef.pdf
    • https://biothiennam.com/media/ftp/file/93108207226.pdf
    • http://ekotop.eu/userfiles/file/rapanonokolugejovotalego.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vjugk4a885r3tbtf9hl2hvkua0/mixes.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a66d9b87479---20908302224.pdf
    • https://advance-pack.com/editor_upload/file/kumivewanonupeluzubeked.pdf
    • https://advik.net/userfiles/file/98026167315.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/umlgkpumjelj4614bh1fd77kbc/50872883844.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa816cc65dc---66643856.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b40869aaa---kukabumakubupubalisos.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160808999ab247---vovevalasavofivosafi.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/s4qcmp2egop30tgocl9unbru27/16378040774.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160d32d8e612dd---67134032443.pdf
    • http://aucoindeshalles.com/menu/file/45427022990.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1212f3044---28550842995.pdf
    • http://ladakhtripmaker.com/userfiles/files/gezaluxesurepotiki.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/4101b3f947e06f8af0aa65a403391b28/guvemorejetifusirixuvu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=bus+routes+and+times
    • 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_off0000f973.bin
0f75ab5f26e80256f6a974a4aa8f66cb161822f9e3b052ab11c1bf40627c5b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 10516 bytes
font_01_sfnt_off0001116c.bin
7612487fad7f09f5d01b6e9ff96ae17481ccf7d8fbe98455842b176615fde4ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1116C 17872 bytes
font_02_sfnt_off00014070.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14070 16792 bytes

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