Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee93a2f8af18a9ab…

MALICIOUS

PDF

96.7 KB Created: 2021-07-15 11:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2859222fbe0c00b0b9ff99b997ad19c6 SHA-1: 466bd33eb36b7f3d3978701b4ab07b82434ecb56 SHA-256: ee93a2f8af18a9ab447b226b94a4fb8d48b992f90cd6205399d5c528563b2fbe
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier strongly indicated maliciousness, supported by heuristics identifying the PDF as a link farm pointing to compromised CMS uploads. The document body is heavily obfuscated and unreadable, but the presence of numerous URLs, many hosted on potentially compromised sites, suggests a phishing or redirection attempt. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 5

  • 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://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/8045598814.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d847ab306---gabajifolibipatawa.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c427213fa9b---lalugumunakotege.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/26587644524.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720cd4e1604---tefeparepokuvupoma.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7c6dd666---82438567559.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097209733bf6---penulabaselepewif.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/317ac5d430f1f7fd25007ccdbbaa8010/52299946972.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b22c8dc598---56914194852.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de6f4c13d55---57987991027.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8aa202f91---gevowelo.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/kunof.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/sageweva.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/5464285195.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/27333045827.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/xitanuwasebutuvesabelamus.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/jemubeliro.pdfIn PDF document text
    • https://mszukam.pl/dat//file/vadepakogi.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/o9k86esqdm9tqprfetdhp9ju34/sepawisemenizidike.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/62692967161.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/lerelisivelisawova.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/kebirulakisip.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e287ae43452---vofun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=turkey+coloring+pages+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11994 17032 bytes
SHA-256: ec7a74f87f94019f02b16703bee048c6b7efd524dc71b47acaf0be57896c8656
font_02_sfnt_off000145f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F0 10964 bytes
SHA-256: 4a080699036fd48c32501ce120b36ad99abf31568a9e8a71ec695e800ac50db5
font_03_sfnt_off00015f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F4D 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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