Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9d0dc3c7a9f340…

MALICIOUS

PDF

82.3 KB Created: 2021-03-19 03:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a11043aeadba7d06e80c1bbadd65aea0 SHA-1: e1eeb5afa186a105f077520f266d37731e89e8b5 SHA-256: 8a9d0dc3c7a9f340a4e06be1453f1678ec884bea7c9dd58c23dc3bfaedfe1eea
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that mimics a search result for a free PDF download, likely a lure. ClamAV and an ML classifier flagged this PDF as malicious, indicating it likely serves as a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=singing+for+the+stars+pdf+free+download
    • http://milky-rp.space/22231778087f1pys.pdf
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/nalukevimupuzo.pdf
    • https://static.s123-cdn-static.com/uploads/4380411/normal_6000300602768.pdf
    • http://pitasulo.22web.org/25694129689.pdf
    • http://vajamerafimal.iblogger.org/wowetigoginobejufezijama.pdf
    • https://felixitu.weebly.com/uploads/1/3/4/0/134012625/85372.pdf
    • https://kopaluzakiletal.weebly.com/uploads/1/3/0/7/130739322/4661794.pdf
    • http://interbank.link/miwavizezizejogovaguduliqrmsz.pdf
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/9340394.pdf
    • https://gunobome.weebly.com/uploads/1/3/1/3/131398345/fagemo.pdf
    • http://rulavilev.iblogger.org/how_to_change_file_size_on_mac.pdf
    • http://sojipen.22web.org/hcci_engine_seminar_report.pdf
    • https://tefafovok.weebly.com/uploads/1/3/4/5/134588422/lafizalogijanige.pdf
    • https://cdn-cms.f-static.net/uploads/4465012/normal_6017df73563b2.pdf
    • https://cdn-cms.f-static.net/uploads/4416928/normal_60181c3be5b82.pdf
    • http://deflecfcvy.best/how_to_install_wd_my_passport_ultrahxldd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nujorowej.epizy.com/92358113001.pdf
    • http://leronusofawu.epizy.com/another_day_of_sun_lyrics.pdf
    • http://wirileso.epizy.com/ataxia_cerebelosa_2020.pdf
    • http://bapomeguradoka.rf.gd/jopuro.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • 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_off0000de12.bin
a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 6440 bytes
font_01_sfnt_off0000ee06.bin
18b3ed4d9d8ea2ad3cc047ec366831fdb61c18938d70711bc295755d75bf17c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5500 bytes
font_02_sfnt_off000100cd.bin
130b567455c402e17542f93c9c4fc0229c688a92654882b4182d5eb418d39864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 10572 bytes
font_03_sfnt_off000124f3.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 16036 bytes

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