Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29d47131721bc82…

MALICIOUS

PDF

102.8 KB Created: 2021-07-21 11:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1e06b00a44bed0b96afa4a61370dca4b SHA-1: 505946a20d51f0dc0adfc634f52f547637706fa8 SHA-256: e29d47131721bc82dd2bed4fef46e0b22ab7192805f22db4a76d013ff681e7be
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm containing numerous external URIs, many pointing to compromised CMS uploads or disposable hosting. The document body was unreadable, but the presence of many links suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://files.ibiza-ferien.de/file/vobevawuzapiwiwiki.pdf In PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c8075878d44eb99e3974fcc2f402cfe3/65956476958.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/gewubetaxaruwer.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090edb9c1ae5---9178084827.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa25af1923c---89626698085.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/beberidigil.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a06d6773caa---53179699016.pdfIn PDF document text
    • http://thedreams.cz/files/29692880678.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7626b3ea65---75034074378.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d7dd3a18cbfb0313f540727793de30f2/dikejimusad.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/c27496fdd17c857992b41d046c5ad2c6/10586086548.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081fae0dbc36---jobimuxunevukeg.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021060619171273499.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9abaafc9a623bf24015956cacfef2fb4/12386090748.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/2611356770.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40f947e04d---gukulirav.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918c6f55d1a---muxoranus.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1a54104964460c8e616b7352170545b4/sogatawoxekomamokuzite.pdfIn PDF document text
    • http://rafaelstore.ru/upload/files/zopigimerusafewepawaxukow.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/5cb384b56193e766197056a3f53420d3/tegidoramojogogurafof.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/58303454113.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/68488822291.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/5j7n06arnn0dqmv38gvgn5iliu/limitimilovibawibexoted.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/panosexedijififu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=weekly+diet+chart+for+weight+loss+for+femalePDF 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_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 11104 bytes
SHA-256: e200c0e5fcdfa0ce447067ca447386a02be64e20a2d8b7db58b34fe61b440032
font_01_sfnt_off000148d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148D4 17304 bytes
SHA-256: a42b0b552b0a1e5d5fd291b66cb381021df609699ee78a1a585401f3d24cf8ae
font_02_sfnt_off000175cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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