Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5ea280d8850c2e…

MALICIOUS

PDF

79.2 KB Created: 2021-03-30 14:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c9619af63f8a3906575b617594cd37 SHA-1: 7412a381e93c9329e067557e954fc3ae6e36ea29 SHA-256: 3a5ea280d8850c2ebd30c443fcd71cec99ca370b55f911f9cd3280ae38ada2c5
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 a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational content, aligning with common phishing tactics.

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://jottigo.ru/wix?keyword=worksheet+photosynthesis+and+cell+energy+answers
    • http://lonotel.mygamesonline.org/viwerapekajo.pdf
    • http://zanapipok.getenjoyment.net/asme_b16._9_latest_edition.pdf
    • http://jabilevij.mypressonline.com/upsc_information_in_marathi_download.pdf
    • https://cdn.sqhk.co/bijukipuj/jdhg9Il/baleadas_honduran_food.pdf
    • http://suporefebakibur.mygamesonline.org/sosox.pdf
    • http://galosidijixiwu.mypressonline.com/blaise_pascal_livros.pdf
    • http://zonerokemub.getenjoyment.net/jatuwikumufun.pdf
    • https://cdn.sqhk.co/dojidavos/ggu0idZ/lilutaxureloxusuvonibo.pdf
    • http://gipogup.sportsontheweb.net/pusubabupisugilebenutikok.pdf
    • https://cdn.sqhk.co/tumitibira/fgTrmxs/zesafajafibug.pdf
    • http://tijudiwulewanuw.getenjoyment.net/aphg_study_guide_answers.pdf
    • https://cdn.sqhk.co/mekizojo/ehhd4ic/juicy_fruit_song_meaning.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/138acf00-ff0f-4a1a-93d0-005de8649296/bopudamasewuwutij.pdf
    • https://uploads.strikinglycdn.com/files/e6ec574e-57c1-4f7d-adca-d3c181ec926a/60533861086.pdf
    • http://soripewanadu.rf.gd/54323488122.pdf
    • http://nelivizazepafo.epizy.com/57083044367.pdf
    • http://kizufalugomux.atwebpages.com/61270717349.pdf
    • https://uploads.strikinglycdn.com/files/6b53b565-229a-446e-a206-c861c75fd2d8/88129342968.pdf
    • https://uploads.strikinglycdn.com/files/2cc29301-dcea-4fba-be33-55634ef03d65/laseraway_fire_and_ice_facial_review.pdf
    • https://uploads.strikinglycdn.com/files/12f52f50-0eb4-4f9a-8404-61a03c94e501/wikerogalina.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_off0000e284.bin
45b53dbe3a586486ca2ca057ecff1d3aee90bcf947c5711743a8a96b09818862		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5608 bytes
font_01_sfnt_off0000f5b1.bin
576af8f1da8d084845a7ecdd0835ab94d6e5c95a46a4e619cb07cc0da6577aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 10540 bytes
font_02_sfnt_off00011a01.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 16092 bytes

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