Malicious PDF — malware analysis report

Static analysis result for SHA-256 8878b36d5a2a978b…

MALICIOUS

PDF

65.8 KB Created: 2021-06-01 07:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 441a77130e81d1f8879b078dd75a5172 SHA-1: 33eba137dd518ab1f2ce74f25cd75904bfc29e1d SHA-256: 8878b36d5a2a978bce6e75dadf72ed938a31565cd5ba03d9a2892a46be9a331b
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize form-builder plugins for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing unwanted software. The embedded document body text, though garbled, suggests a lure related to 'Igo primo maps 2021 europe free download', reinforcing the phishing or scam vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://cructi.ru/uplcv?utm_term=igo+primo+maps+2021+europe+free+download
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba62ade2c7---zadigasoxowe.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d545ab73d---48107196567.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/3osndn0k87uv2nn5oq21nn4c43/34201404371.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c943573d52a7784a515f538710e67b5a/muveve.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f9ab887b27b8734e0640aeef2a240c97/meridowubasuzel.pdf
    • http://blueyee.com/upload/file/17000513846.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/0768si4v5ht02s0l5rvdrlfs5a/rasumamamiwemibujilopena.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abd2f926b0d---64666150825.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/xetixupe.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080196e7129f---nuruzozexaxigofojozajorox.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5626138ca8d62b9e237bcbf817b190c0/fuwenimiwegu.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/71eb994e4736a31684f99095d8508d44/74920138367.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077579d446ae---xipulukuroj.pdf
    • https://lapalettedesarts.fr/gestion/file/dasujetugixoxewuxuped.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b60645354d5db5e717f07d3f8c140494/35603936036.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bffa.bin
fbfcc4681b2084ec89ecf7118b885991faecfa00e8dc7b845e96ed624ec3f118		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFA 5516 bytes
font_01_sfnt_off0000d2ad.bin
db72f3e026c155128de6fbc130ee5012bf51232b780c9925dc83fcf0341342c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AD 11124 bytes
font_02_sfnt_off0000f6f0.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 4324 bytes

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