Malicious PDF — malware analysis report

Static analysis result for SHA-256 369ebc7f0e33bbdc…

MALICIOUS

PDF

94.8 KB Created: 2021-07-23 19:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9532ac483f346a5fd083ae0b2399cf8 SHA-1: f241c00a3e035fa978844342cf8e89354fd70338 SHA-256: 369ebc7f0e33bbdcd2c58af33c6f35801ebd883fa51854e8ffab8bca6edb6d4b
156 Risk Score

Malware Insights

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

The PDF contains numerous URLs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or redirect them to malicious content. The presence of multiple compromised CMS upload links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cf5e585f7---26118939671.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/bbe32fc6c023b4200c154aba56d1259a/tefexarezovita.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/0pf5keiou3d8b4rrpvo5ajqaru/4665407016.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a78f1a6923---napem.pdf
    • https://rinducm1.com/contents//files/20839589062.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608aed8381fa9---40247029650.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/0264368ba4cb717b671916f299a7336e/4211708048.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b24a9434d6398e53f552d1e7e0404962/93172835018.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/qaoa3bvogofqk5apfjdblsq8v6/80952947368.pdf
    • https://etadelloro.it/images/file/zodibefuvozuto.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/eefnvioovn4co2tc3eu298vbmc/12345674.pdf
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/59069432602.pdf
    • https://amatnieks.lv/pictures/image/novufuforulijofofox.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a162b38eb---zowinaterov.pdf
    • https://activepymes.com/pub/file/84392635878.pdf
    • http://bassbasement.org/userfiles/file/wavomijasi.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7391ba8a1866a1a32055cb03d207a543/5680129494.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0bce7c4db---62366288446.pdf
    • http://studioturina.com/userfiles/files/50117230925.pdf
    • http://qianlong99.org/ckfinder/userfiles/files/nanuz.pdf
    • http://ajivikafinance.com/userfiles/file/67990185445.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dragon+quest+vii+tombola+ticket
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0bf.bin
69f60ecbb2b3ce34c058cb5164d4cdb518f7194527f50579f231cf561f2f7c21
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BF 15740 bytes
font_01_sfnt_off0000f8e4.bin
857b480c75a8b51b4ff4b06e72039bde6d6bd3fd55791dfd14abc5a98ec4b734
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 21564 bytes
font_02_sfnt_off00013903.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13903 16792 bytes
font_03_sfnt_off0001511a.bin
634432ffb2c946afc654d50913965e1fc1023e61afcf35f355a89457f1f559ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x1511A 11120 bytes