Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9dea27bee41417…

MALICIOUS

PDF

102.5 KB Created: 2021-07-16 16:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 62dab9c613eafcde3f67a0d1cce3b35b SHA-1: 7d1971440cf6da75acfd8d93c2652149ba82fab8 SHA-256: 7d9dea27bee41417a81e04805502edc6017c35b6495236ff6b2c372d4510f820
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bf30074f4---89320234720.pdf In PDF document text
    • https://walkandsmile.com/userfiles/file/35816233390.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16078f9973c4c9---42067520893.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/2a4ipctl23q1eomqbmq227qa91/renipu.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/699530672fb3eb11dde2860a318c90fa/46846937515.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/59484920605.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/774616f5fb3a91f8392e0ea2fb26c708/fodokolupulazi.pdfIn PDF document text
    • http://markone-tools.com/upload/files/pedejirafuzisonuke.pdfIn PDF document text
    • http://hydrem.ru/images/file/13331516301.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/5nico45i81snssb6saabk5npv4/848916082.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/93867258795.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/66532283538.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/bb628c1aba90f7816076cf43e73ee923/42757834852.pdfIn PDF document text
    • http://chikatere.com/Upload/files/dokufujobudezafive.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/18429669681.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef5ef1d9f---84122481297.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/credpib5kelscjgtpdnkr56h95/zutizofog.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/17772307537.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/4953586758.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/wojimubujapekibewejixomu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/14719311ce5efb2c3e294b1066660f36/59885729659.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b73d468ef3ff0c32c0c551de495e6dfa/sabafipagibome.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/96494438552.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/731862cicn4llaq1lhedpdkmf6/10372427542.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/12495607747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=functionalist+perspective+on+socializationPDF 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_off00012ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECC 17380 bytes
SHA-256: 0dc900fa5bffdd49df0ebc8e2b77218757eb1091a0bd47d235867648a8adbe3b
font_01_sfnt_off00015c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0D 10568 bytes
SHA-256: 38c9dad9de3304a0f94db42e5efabcc4b9f0992d04d54bb71c26757563d579a7
font_02_sfnt_off0001745f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1745F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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