Malicious PDF — malware analysis report

Static analysis result for SHA-256 13efa99bf447c1b4…

MALICIOUS

PDF

74.2 KB Created: 2021-02-21 09:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2ce44ab60c806c667ee69cfd1140465 SHA-1: 9dd27bcfbe1bea473880c5ea514cf3e872e7a712 SHA-256: 13efa99bf447c1b4365ec6f37bbf0d6a3a9048ef44f4b905877212c467966f8c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a site mimicking a search engine result, likely to trick users into clicking through to a malicious destination. No scripts were extracted, but the PDF structure and embedded URI indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • 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://maypoin.ru/wix?keyword=white+pages+waterloo+iowa
    • https://cdn-cms.f-static.net/uploads/4403540/normal_6021aa1e720c2.pdf
    • https://cdn-cms.f-static.net/uploads/4410727/normal_5fda236a1345f.pdf
    • https://cdn.sqhk.co/xubulozirod/3yjdgft/bomalipibomaparaf.pdf
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ff92c6e6d62d.pdf
    • http://max-lifting.store/nejedonafipuginesigivakzu2hl.pdf
    • https://cdn.sqhk.co/tosilura/BpUBjiZ/1721308666.pdf
    • https://cdn-cms.f-static.net/uploads/4476593/normal_601de7f28c164.pdf
    • https://tuxinotem.weebly.com/uploads/1/3/4/8/134883911/7457031.pdf
    • https://cdn.sqhk.co/lawafopugu/hghhf1c/34237951342.pdf
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5ffc64f5c3483.pdf
    • https://cdn-cms.f-static.net/uploads/4371240/normal_600ff2e531f02.pdf
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/1066239.pdf
    • http://lienforkid.com/home_design_3d_app_for_android_free_download7813p.pdf
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5fc63113df740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kifugelewepin.epizy.com/nufodubirowikaditaxexuvi.pdf
    • http://sonexononabon.epizy.com/how_much_is_a_2016_lexus_rx_350_worth.pdf
    • http://nekepozime.epizy.com/doctor_stranger_eng_sub.pdf
    • http://rozugok.epizy.com/wooden_dummy_price_in_sri_lanka.pdf
    • http://metorudadoz.rf.gd/3074599874.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7f.bin
025052322023f08da5e9b37ad76123f38431c297fe893426c14b3a7460b5e001
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 5188 bytes
font_01_sfnt_off0000ee38.bin
436f43e514c47cc2344ae5d0f487e8d0327eaa7780eafe5a4a18f81f28ab6108
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 14716 bytes