Malicious PDF — malware analysis report

Static analysis result for SHA-256 2527461f8ef857ea…

MALICIOUS

PDF

86.7 KB Created: 2021-06-27 12:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d18dc4271e6506d16458d143d02dca7d SHA-1: d522f5100ff9c3be0562cc0bdbd05d875787e316 SHA-256: 2527461f8ef857ea0b1b5fcd59ebed871043b904bc6c8877cff0884002f33d05
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0618cedb---38696469952.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b2bea43a2---51610288109.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f82232a6c2178c7b91d7cab447ed0d0d/bojabumeremabudemogef.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/vd7ov6ehsrqks7npie2eir3bi5/wijawogulose.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab4027c321---7441794443.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/balizedova.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607166bb4b1ac---72237308692.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/hf8qfcjo26sluf3vgq64h79p5i/95382832860.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160773273d6313---kozasigoz.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/o2r6dhioq1hsumtb3lnra564bs/fopevo.pdf
    • http://hayatteknoloji.com/webimage/file/vutawigerirutelowo.pdf
    • https://swift-tw.com/lcc/upload/files/1233630468.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a3032baca---sexumenetexegorajinow.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2709855b4---mojunewe.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee93dcc73---48146643875.pdf
    • http://goraku-sangyo.com/userfiles/file/nivowilidiwaxorum.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/a34255489df2e77888fb9795181d2dee/32015484288.pdf
    • https://heatingboiler.ca/fck_upload/file/22991509005.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7df353affb---mesujaj.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/712dcfd154bcf51c6c46b0116549242c/72075099133.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798377efe14---57881525698.pdf
    • http://hitecds.com/userfiles/file/kudezidef.pdf
    • https://maxflowfans.com/userfiles/file/76194643062.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/7ece9396e78aaf937edcb41536732b58/50762148499.pdf
    • http://sevimticaret.net/userfiles/file/36590121337.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sickle+cell+anemia+crisis+treatment
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f124.bin
1eacde7f0823bd6aad1de30ce2aee50364034dcf07fb507fd6b6169bf780f956		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 17116 bytes
font_01_sfnt_off00011da1.bin
481349c2914efc42914e4d63a193707f4ea56e6e8dc7dac85edd794468ef6fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA1 10440 bytes
font_02_sfnt_off0001353e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1353E 16792 bytes

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