Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67212849112e141…

MALICIOUS

PDF

103.5 KB Created: 2021-06-25 16:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 873ce13799cb3f87b6845e8486466e79 SHA-1: a42d8bfcfef513e4ef7911f352f6c3060e93fe2c SHA-256: b67212849112e1415150e2ef202b7527b18be011dcbe6b1dd6c8d8a642b965a2
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://akapacha.com/userfiles/file/17575404430.pdf
    • http://sakaryakasaplarodasi.org/userfiles/file/fuzanesakejivujazifekew.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95acbc1c79---mimananagutu.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/e8b452b45f0b83fe6d8460d55c3c5e70/59505793209.pdf
    • http://schmetterlingsgaerten.de/file/60591243113.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a97acc7dbca---12019680507.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092719e2fac6---vegupim.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/3c69549a47d2f7b59ed004d7c047b261/76657741329.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c1932e47ea8---71136745676.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/43979319936.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/73ecb9a26a4fe977090a0e64ea9f7522/lowumep.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/ca93fd3a2854b50fd0e7b7e153693d1d/jakomes.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/5eluccclkkkg3ujs54pghe6tc3/lojitigonife.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/51c51b651fcf95457bee261f826293c6/lixaleserofegodi.pdf
    • http://dalboncostruzioni.it/userfiles/files/liwavidigozajozikugan.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092745e6054c---lekokanatunu.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a322cd3f913---pulokabim.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9d58deab306415d8f5c6593a05ed2f48/53473911804.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=meaning+of+intellectual+rubbish
    • 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_off00012ee6.bin
8bd9758c56a9686fc762046d2d8c5663ef4d7358451f4280a864216da082ab3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE6 10848 bytes
font_01_sfnt_off000147e4.bin
d2c0c17fbcec8ff2af8c11ef075fb8e08ce804416526c95f6c54bcd5a32109d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x147E4 18288 bytes
font_02_sfnt_off000177c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x177C8 16792 bytes