Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e775014b7722c4…

MALICIOUS

PDF

84.7 KB Created: 2021-09-18 13:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a6a5e06a6a347817e5059b0813d2aed SHA-1: 1279a42030ff1b601e272b07a759ae75dca20403 SHA-256: 24e775014b7722c4c583831b7239b40369ae786a0d0583d9c4677df7dc7c3aa9
96 Risk Score

Malware Insights

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

This PDF document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to lure users to download malicious files. The ML classifier strongly indicated maliciousness, and the presence of numerous links on potentially disposable hosting further supports a malicious intent. No scripts were extracted, but the document's structure and URL distribution are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://vivo-mebel.ru/upload/file/41704085062.pdf In PDF document text
    • http://sangjeom.com/userfiles/file///62597652166.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/76226b7118fb0171adffa898015ff837/14972333018.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/45855243303.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/veriwepanamokigokopali.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/89736154940.pdfIn PDF document text
    • http://szerecsen.hu/editor_up/rebokekikij.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/4839311477.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f1255a3a7---wenepudomoxixanofosiza.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/a9b4999af85b9a97224ee4f90d534cda/bapirulipenafaxog.pdfIn PDF document text
    • https://qnzar.com/files/webofanosutaf.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1456649117613a160a017db.pdfIn PDF document text
    • http://pasted-radio.de/web/files/rerinelifafupasu.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5c6c2b34bd14e64c06eda160598377a8/35727341459.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613212ec694d1---kobezen.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/60019262064.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/kisujexapegil.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/tileliwawo.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/95523003758.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614097dfb9e9b---rajesosositutiwabovivogu.pdfIn PDF document text
    • https://maisonforville.be/documents/file/doxebolimemek.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/58001091688.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/bedava.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/galipiporesetopoxaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=answering+machine+for+androidPDF 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_off0000e440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 10844 bytes
SHA-256: 12e7fbdda74e80fd48cce7fe587e2765678c53717e39d09e134913ab88f36e73
font_01_sfnt_off0000fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001150e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 18684 bytes
SHA-256: 8dd3ff93ca1653ec0759d3ac063e6ed96ac985ea5dc8d88865b3e8bd2d12ec88