Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36fa36dd6accfd7…

MALICIOUS

PDF

80.6 KB Created: 2021-04-07 16:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5a64cc51583b4d0c075ff766ecb9cb7 SHA-1: 507815aeff4222a5fa2db0de3348debd45a7d6ee SHA-256: a36fa36dd6accfd7a363bd40d40693076807de5597c3286d535d76fa35219343
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is a known indicator of malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=hello+moto+ringtone+girl+voice
    • http://oneplusonemain.xyz/la_vida_precoz_y_breve_de_sabina_rivas_pelicula_completa_repelisgrkbc.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fed2b02e01cd.pdf
    • http://wiwajaluje.iblogger.org/nimupim.pdf
    • https://cdn-cms.f-static.net/uploads/4446036/normal_606631da08b14.pdf
    • https://cdn-cms.f-static.net/uploads/4417534/normal_6040f13247aea.pdf
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ffaadb243245.pdf
    • https://cdn-cms.f-static.net/uploads/4495034/normal_600f5a5e932da.pdf
    • http://mebelrostov.ru/how_to_do_trauma_release_exercisesohpe7.pdf
    • https://cdn-cms.f-static.net/uploads/4497638/normal_602b3bb491f3d.pdf
    • http://kekemubitaf.iblogger.org/sisuvogapenugubefajisu.pdf
    • http://fastcreditcheck.info/71979049421nzpbs.pdf
    • https://static.s123-cdn-static.com/uploads/4414173/normal_6008d8af5b259.pdf
    • https://cdn-cms.f-static.net/uploads/4460690/normal_604cbb9e6171a.pdf
    • https://cdn-cms.f-static.net/uploads/4497395/normal_60518e95f3fd9.pdf
    • https://cdn-cms.f-static.net/uploads/4416675/normal_606bc45edce5a.pdf
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5fd17fd90d518.pdf
    • https://cdn-cms.f-static.net/uploads/4454968/normal_602f82aecba2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/furunumaroxun/powerdirector_15_upgrade.pdf
    • http://gixisenusadat.rf.gd/ge_healthcare_ion_exchange_chromatography.pdf
    • https://s3.amazonaws.com/mubemutolewe/the_art_of_manipulation_omar_johnson_free.pdf
    • http://wamigorudazuz.epizy.com/bushy_park_run_report.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e993.bin
1ba11bd4667ae0f07e59960b0601ab05c344cc68cc8b698eb35c6a9a0610f41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE993 4752 bytes
font_01_sfnt_off0000f9b4.bin
e9eed1ebbb45df404b7395a4c8f2e48cd53b09464f764feac183df4b70545d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 11116 bytes
font_02_sfnt_off00012011.bin
7f85b26e62eba69146dc7438ff276137e072823ff9fd45ab382834de6c431daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12011 16080 bytes

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