Malicious PDF — malware analysis report

Static analysis result for SHA-256 b645050d938f2f06…

MALICIOUS

PDF

66.8 KB Created: 2021-05-17 20:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a93dcf0059d7e803daf04cc840c2c8 SHA-1: 6e476f900bd8ae04f972e9e3d8d38fd45214daf3 SHA-256: b645050d938f2f06c880448e798ad0167e8cf4c982510d146ad8a8b59c361838
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/strik?utm_term=hp+deskjet+2512+cartridge
    • http://jorowijedo.mywebcommunity.org/canon_powershot_a560_memory_card_error.pdf
    • http://sazinoz.mypressonline.com/the_vedanta_way_to_peace_and_happiness.pdf
    • http://musomojil.mywebcommunity.org/fourier_analysis_an_introduction_stein.pdf
    • http://jenuxijaf.mygamesonline.org/3630835799.pdf
    • http://tometifo.getenjoyment.net/vipuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_0237530f9b84407687d0929b99f0d812.pdf?index=true
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_4c100b90d8d941d289a75a7fdff704dd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dabf0625-9750-4654-8514-6a94a53eb7cc/53040985770.pdf
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_accafd5a2b3846a68911667e5c6c6272.pdf?index=true
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_1fcd435e36a84b3bb4aac15e7a9b6fe8.pdf?index=true
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_31cc2c7c7ee24a90a454405c074dd3ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/100b2515-0c80-41ba-a38c-c919c5902417/maytag_quiet_series_200_issues.pdf
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_bbeef965c4ad485382f40dcdc4e87dac.pdf?index=true
    • http://kafotafuvodalix.onlinewebshop.net/30253992071.pdf
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_015ec75bfae04144a5ecb15d9d7a3d97.pdf?index=true
    • https://8e8ef6ac-913c-489f-8395-c30730e7ba0a.filesusr.com/ugd/f39c52_026a1b4316fd4c0284d027a86d1d8c37.pdf?index=true
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_ca6ffadb1aec4ab1a26dbb13dc10e9b3.pdf?index=true
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_e10940df2c36435d94b4e34513e8a15e.pdf?index=true
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_0c25eb6873e54ba589714d1012a952f3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a0e93b9-7178-46a6-a059-ecc2edf1fddc/s40_vs_s60_garmin.pdf
    • https://65f7c47b-6fa2-4aed-9649-637438a88329.filesusr.com/ugd/8fb471_1d66ac870a594cd98071fd5780247609.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_afc105940e4546078800819131ebd922.pdf?index=true
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_9813211ecbf74fe992284283a5103955.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bb3bfe3b-87bc-448d-9507-cd3757962990/wooldridge_econometrics_5th_edition_solutions.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02c.bin
d1727e0aa1a3f0c351a34f444049365ac5cc13a3df2da15b129db6db43670370		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 5620 bytes

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