Malicious PDF — malware analysis report

Static analysis result for SHA-256 a353bae3bc8871c3…

MALICIOUS

PDF

94.1 KB Created: 2021-03-29 13:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0334875d0529befff9e11c3802a5532f SHA-1: af46b66b214c4db08822b22f6b6d98e21530175d SHA-256: a353bae3bc8871c3c451143d1428ad979717cfde6fc706974641bc89b74159db
94 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of an external URI points towards a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent to redirect users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7536

Heuristics 3

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=pdf+bhaktamar+stotra
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/20606edf26bac.pdf
    • https://cdn-cms.f-static.net/uploads/4469128/normal_600b6a5da42dc.pdf
    • http://bettyloustintruckbbq.com/59207099938fynl6.pdf
    • http://prizinsta24.space/how_to_fake_a_mailing_addressex9ng.pdf
    • http://24goodstore.site/how_to_do_an_absolute_value_inequalityg3ql0.pdf
    • http://drive4mclaneeffingham.com/22023261980dwbsp.pdf
    • https://cdn-cms.f-static.net/uploads/4386834/normal_600b9e2cf05f5.pdf
    • https://static.s123-cdn-static.com/uploads/4446029/normal_600601faa122f.pdf
    • http://zijilip.iblogger.org/chaupai_sahib_in_english.pdf
    • https://vedaputenada.weebly.com/uploads/1/3/5/3/135318287/lusovojig_vawikinumaxer.pdf
    • http://neviresutuv.iblogger.org/gukerarav.pdf
    • https://static.s123-cdn-static.com/uploads/4465701/normal_5fe02e7bc7042.pdf
    • https://cdn-cms.f-static.net/uploads/4369514/normal_6050998a1bfb8.pdf
    • https://cdn-cms.f-static.net/uploads/4415944/normal_6058be4ab4279.pdf
    • https://static.s123-cdn-static.com/uploads/4392457/normal_5fcf7f285c780.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://noxoposuxasife.rf.gd/33150506256.pdf
    • https://uploads.strikinglycdn.com/files/5c1cf298-87aa-467d-b371-1723fe204648/pitekolekofenorudowenokas.pdf
    • http://tuserigetov.rf.gd/automotive_industry_definition.pdf
    • http://tejojode.rf.gd/63823703105.pdf
    • https://uploads.strikinglycdn.com/files/cd74c4e3-1b51-42d2-b34a-c4e75478e5cf/18672325038.pdf
    • https://uploads.strikinglycdn.com/files/0394ded3-4283-4815-83d6-c65455386bc9/traction_how_any_startup_can_achieve_explosive_customer_growth.pdf
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102fe.bin
c515264fb4e1b6194d80319e099618b07d79de5ea06b8f5f7324288b4720e0d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 5320 bytes
font_01_sfnt_off000114e6.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x114E6 3720 bytes
font_02_sfnt_off00012049.bin
a0b46cdb05acfa97af9d6d3d1a5726be4a8747d9c72a5a0f25647cc7b23fe225
pdf-font-stream PDF embedded font (sfnt) at offset 0x12049 10852 bytes
font_03_sfnt_off0001459d.bin
461a1578f80084b2f2ca998a6e716936969cc9b33b2976d66eaaa57f6abee57a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1459D 16172 bytes