Malicious PDF — malware analysis report

Static analysis result for SHA-256 af46503c430bcf1a…

MALICIOUS

PDF

83.6 KB Created: 2021-03-29 17:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79eb9a87260378b93a1610295d02117c SHA-1: 2994df4d1203bcdccf0e8f9bb88d9098e1f57706 SHA-256: af46503c430bcf1a2b1a3a096f4beae0707675a03641e2db069e75c3b139df15
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to educational materials. The primary attack vector is likely spearphishing, with the PDF acting as an attachment to deliver users to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=subject+pronouns+in+spanish+worksheet
    • http://artistichomesolutions.com/lenovo_ideapad_320_amd_a9_reviewn6bhv.pdf
    • http://wordwild-store.com/shooting_table_diyk1dh6.pdf
    • https://cdn.sqhk.co/zivalutapa/gfjj7Xo/balepesagukajov.pdf
    • https://vipunufevewe.weebly.com/uploads/1/3/0/8/130874016/69e9d.pdf
    • http://cashthe.ru/zokonabotpmkv.pdf
    • http://remoliwagofaju.mywebcommunity.org/vilugelafiguxo.pdf
    • http://eslivdrug.space/tenker_projector_manualzodvm.pdf
    • https://damasidegiked.weebly.com/uploads/1/3/1/4/131411688/7433351.pdf
    • https://cdn.sqhk.co/diridenafa/fmSicgg/social_media_intelligence_book.pdf
    • https://cdn.sqhk.co/posojuvapono/ahbHEHI/71223910850.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://jimurapixow.weebly.com/uploads/1/3/5/3/135399705/nolupotobojaw.pdf
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/xelali_gajerimesutu_pumexoma.pdf
    • https://cdn.sqhk.co/zanivuwiduvo/aYjebQS/topia_world_builder_gameplay.pdf
    • https://cdn.sqhk.co/lakivasulis/NPiaicT/employment_application_form_sample_malaysia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kokogaradomope.epizy.com/how_to_repair_john_deere_riding_lawn_mower.pdf
    • http://towirasoruxapob.rf.gd/java_11_jdk_and_jre.pdf
    • https://s3.amazonaws.com/venunamazozuzo/92432529577.pdf
    • https://s3.amazonaws.com/vovuzize/15665043663.pdf
    • https://s3.amazonaws.com/xezujuxoz/wanufalunafasemo.pdf
    • http://safedoguno.onlinewebshop.net/permenkes_46_tahun_2020_akreditasi_puskesmas.pdf
    • https://s3.amazonaws.com/metubevozisul/63573556671.pdf
    • https://s3.amazonaws.com/firudegix/masugojapusaf.pdf
    • http://tojuzurukepise.epizy.com/rujabofipesupirev.pdf
    • http://lisunamubeso.epizy.com/8324766847.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_off0000ec5d.bin
a718c46bbedbbb911e64dc2afdcebcaf95349c7def55f5d53ffe4fa407c9dc3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5D 5464 bytes
font_01_sfnt_off0000fefe.bin
b69b9ad24ac436c188fdc471b9730c583825345859550855d7817cbaab66c89b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFE 11912 bytes
font_02_sfnt_off00012673.bin
220557f9fefc48c132563fce936213c7c8b5986fc23c5907ac9a8b16c5bd5a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12673 17984 bytes

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