Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba917223e6860e23…

MALICIOUS

PDF

86.3 KB Created: 2021-06-15 18:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 116b9188b4d9e27eca3a6164e9aa7492 SHA-1: ad897b84860f400352b787221c52bfa24d3e1389 SHA-256: ba917223e6860e2353358246edc842d1d8572d6313ab154601bfcc695dbcbc5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, including one pointing to a compromised WordPress upload storage, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://garglob.ru/uplcv?utm_term=mmi+medical+school+interview+questions
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4747d76049---xovog.pdf
    • http://tgtech-auto.com/userfiles/file/jilolisofokavu.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/602a9e0028fb5cfc37b2cfaff98a1b91/90717319227.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609491fb6505b---50626514999.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160784e39cf96b---samixagebamudapaferi.pdf
    • http://amandamaitland.com/images/file/popokopimulukovikogo.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f201959db0---fesudapawupuragi.pdf
    • https://parklanehotel.asia/userfiles/file/getivimuzajom.pdf
    • https://giustofiori.it/file/dewudi.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/ehn0n5q6joh5l8ohta03tfjfg5/babami.pdf
    • http://provia-events.de/pics/fotos/1/file/31189065272.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/55721945122.pdf
    • http://arslanemlak.come/file/folurijopugamezejivava.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/35f835c1f39bd47652c72322768d3052/19632345582.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/k57vgeaad69lmaktfehs5ajog6/vofowuxowotajariguzakara.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/0j67ivdre2gtho5e85p0jj0lsp/38454693696.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d26.bin
3be32e39213efc3098d8c7a71d190dcc9d6fb48290661c1093465eb11c783c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D26 5460 bytes
font_01_sfnt_off00012fa4.bin
ac088610b43445b0b9d230fc347f083127286104d6067e684610d1e2f57ee99d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA4 10732 bytes

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