Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa2ea5db32bc2ea…

MALICIOUS

PDF

69.8 KB Created: 2021-09-05 22:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 823dbaf640b31e5f61a756b5385ac2d5 SHA-1: fe6389ce2cb3aa029f158393199330acf52ea24d SHA-256: 6aa2ea5db32bc2eace175f4b862b5315590cb00c26cdd1160056cdf510a678cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable domains, likely to distribute further malicious content or phish users. No scripts were extracted, but the structure suggests it's designed to lure users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://agcslohian.com/userfiles/file/bakibakubu.pdf In PDF document text
    • http://andlupa.com/userfiles/file/ridakavanuvogekofanexa.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f97afcdc101836ed711ff5bab955ab61/19865966117.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2598bee23---9241177901.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/83474372647.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/laxasaxerofurirokiz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0252e65e82---mezojebolonada.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jakafofurojamofomiwulot.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/mukojumisozuladuwa.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/fivuwal.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/tonod.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/9158c4abc9c10e098c80814fac079cd5/tovipubutitufasusatip.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160af763d19d35---51819414458.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/eompadri7phtip4ebo21qghde5/65443754993.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a7d68c1d89b6e23377ae07f51d716423/10240843648.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/6533076864.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/4da98a894726bc93975a192dd261dc0f/defetag.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de8ccd3ed4a---govutadetorafaruzonapibes.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/zavotavu.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/36270435870.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/megenis.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9074aa9045---8152765436.pdfIn PDF document text
    • http://berbun.com/user_img/file/jokixolonirop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=parker+hydraulic+motor+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14C 15468 bytes
SHA-256: 0af91f47765c202aa4e2331b694a4b9b55200585162669909c6d8f099117da8d
font_01_sfnt_off0000d88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 10920 bytes
SHA-256: 704ac7ad3640c411662e4c0aa904e0dec147774ea6115c42102ee0c91f6e055d

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