Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0f63d5983b9ebe…

MALICIOUS

PDF

152.2 KB Created: 2021-04-06 11:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f59e6bca784a759a50571e37554312e0 SHA-1: 7793a5d59f32950c009e5e6c39f11f32a0212728 SHA-256: 3a0f63d5983b9ebed8e21bf63a77f95c49298e4b7056ca1891cedec17e037df1
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text that could be interpreted as a lure related to 'L alphabet hebreu pdf'. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://nipisod.ru/award?keyword=l+alphabet+hebreu+pdf
    • https://cdn-cms.f-static.net/uploads/4443292/normal_603a1f35004fb.pdf
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/sukajitijap.pdf
    • https://cdn-cms.f-static.net/uploads/4466376/normal_6048fa49b11b6.pdf
    • https://xemuputib.weebly.com/uploads/1/3/4/5/134506680/xomonamoma-nusoxasikapobe.pdf
    • http://grizhoff.ru/dbt_exercises_emotional_regulation7qdcq.pdf
    • http://storeeu.info/404376600467ddd7.pdf
    • https://cdn-cms.f-static.net/uploads/4426955/normal_6045c37d0af15.pdf
    • http://nigavereke.mygamesonline.org/fejojanitok.pdf
    • https://static.s123-cdn-static.com/uploads/4477635/normal_5fcd81fea4c77.pdf
    • https://gimepaponu.weebly.com/uploads/1/3/4/6/134614910/nujofu_jelabe.pdf
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5ff93823857f6.pdf
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/kexikonaxez_dekeruges_vumibewojeteg.pdf
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fee72b3afbb5.pdf
    • http://zimejitudik.iblogger.org/buff_dude_handshake_meme_template.pdf
    • https://tetugisiwapasuv.weebly.com/uploads/1/3/4/7/134744560/nawepaxemolo.pdf
    • https://cdn-cms.f-static.net/uploads/4379852/normal_601d5c5174650.pdf
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60341c8f21916.pdf
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fdeb26626d20.pdf
    • http://siondez.ru/westworld_season_3_episode_2_scriptrgc3s.pdf
    • http://manamuposa.getenjoyment.net/how_to_pick_godparents_for_baptism_catholic.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jekexavax.rf.gd/telephone_billing_system_project.pdf
    • http://xuxejoser.rf.gd/10565285654.pdf
    • http://genenapukiral.epizy.com/30772289206.pdf
    • http://bogisuxefitis.epizy.com/putekalozufi.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000202cf.bin
321eff4b2b241c4b6f478a93ba74a90a9e7cba20aa7588975493039cec086ad2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x202CF 22720 bytes
font_00_sfnt_off0001a647.bin
86278f78ae845fcb94dd8b88c784810790bee7c7f44957dabbae793cfc18c08a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A647 4652 bytes
font_01_sfnt_off0001b622.bin
a7cdddf3e9244294efaea487546a7f71a03a870c32afbfa9816fd8769e4c300f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B622 28180 bytes
font_03_sfnt_off000229b5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x229B5 4324 bytes
font_04_sfnt_off00023777.bin
22302d08d65d85b40cee3417c90e33024ef5a72ebe150cb37fc8a964a3f0e22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23777 9160 bytes

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