Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f8ff6c97c7f409…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 10:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 442290df31b2735eed784f6c73677763 SHA-1: 7acda33e9761efb7fb8f6f4db3483eb3b2904958 SHA-256: 19f8ff6c97c7f4091629998e247aa636cba82bf6b5a92fe1d4d2a44b896408da
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with several heuristics indicating it functions as a link farm. Some of these links point to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://khacdautron.com/Images_upload/files/vopuvoviw.pdf In PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/83082870518.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606feb51cfbcf---96145077058.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/74081326808.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e2f8b01bf---bijibetoso.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/22068815057.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/potetedi.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/6406395631.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/92964531441.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/19292556475.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/24913611197.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5141bbb11---63908016942.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/76572884383.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/1ceab978016e79574853c33f0ccdb2e1/73400704471.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/99fcgoirf2f5oqin96u7n9e05b/9845379110.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/3lp8honb32qisupsqguof7lte1/567072859.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/71869428884.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/92714947441.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a367bf72a---75965373171.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/kafevevulidosasison.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/miwinabazatoroxafog.pdfIn PDF document text
    • https://jensbrode.de/files/file/23132587580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+i+teleport+someone+to+me+in+minecraftPDF 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_off0000dbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE0 17712 bytes
SHA-256: 036667392ca4d401132b9466e1f1ac3bc033dcec45c75608a794d934457c3d0f
font_01_sfnt_off000109b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B7 10860 bytes
SHA-256: e92abd8f7fd0f4c54fab531da79b2b944ef6a31c98bf94c63485fb36af5e754e
font_02_sfnt_off000122c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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