Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd37b74c5648f0b…

MALICIOUS

PDF

77.5 KB Created: 2021-09-08 09:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2820366f8eac06ba15b94ea0983fd8a4 SHA-1: 1dd3281ccee44dc33600182fe3e35e85944463dc SHA-256: bbd37b74c5648f0bf6c107dafc0ffa5a5d3ed7224ab29f43b09101d9b8c2c3c7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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=fender+mustang+lt25+amp+manual PDF link annotation
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/bikak.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/46874990471.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/jepobakepozoketadi.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e608a313647---89221421842.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/gonivofigebewefoji.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mgvefhj89kign1jaanm43cmkkd/muwumipurevadiza.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/rivib.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985897dab8a---xopopigivifezux.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/64553837785.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/tikutexesevugirijetitubiv.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a10368233fb---43553830314.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210829161024.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/52367176974.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/35111582915.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786a19a185d---61370944690.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/18c64cf6e1bd469d7d7b2fc88a1284ee/54980496422.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b08bedadd---3140759542.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/53396320624.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/vaduwelufixalabizo.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/wivir.pdfIn PDF document text
    • https://peterdegendt.be/file/23404215193.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/73164734448.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pubobola.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/44496231250.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/koxegimuvuvabofibikepomad.pdfIn PDF document text
    • 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_off0000c13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13F 21116 bytes
SHA-256: ee59be4ff662cda8fd9d7deaab2f26383b12e13622ed1edd107e26018e55dad9
font_01_sfnt_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 10852 bytes
SHA-256: 4c1bfdfb424ac305ed36138939db1e212b5afb0b9399b4b9450cef30ddf48f86

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