Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c62224f56662109…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 16:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95bb18391052cd9fb6749ec9f35c30de SHA-1: 5afa7f337709463fb7d6e5c54d170c8008ec16dd SHA-256: 5c62224f5666210998c50ded9636821c91a10ec5f3cdaad095669b38ec0ce61c
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, appears to reference educational documents, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=12th+marksheet+ajmer+board+2017
    • https://cdn-cms.f-static.net/uploads/4408333/normal_603e8169d5798.pdf
    • https://static.s123-cdn-static.com/uploads/4414868/normal_5fcdc9c8d28bb.pdf
    • https://static.s123-cdn-static.com/uploads/4466666/normal_6000fbcf3c864.pdf
    • https://cdn-cms.f-static.net/uploads/4369766/normal_600f9d27cc831.pdf
    • https://kosazalosir.weebly.com/uploads/1/3/2/8/132815054/nuginitawonuju_fuwapavowe_miduwibofake.pdf
    • http://bikelumonekodex.mygamesonline.org/que_significa_cuando_sueas_que_vomitas.pdf
    • http://gedadekenoz.mywebcommunity.org/what_is_the_calorie_deficit_needed_to_lose_weight.pdf
    • https://soxodoma.weebly.com/uploads/1/3/4/6/134695887/gagixugejuwewo.pdf
    • https://cdn-cms.f-static.net/uploads/4367947/normal_601fbc5676c20.pdf
    • https://cdn-cms.f-static.net/uploads/4369653/normal_6014ba3b2b7dc.pdf
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5ff2799b31dad.pdf
    • https://cdn-cms.f-static.net/uploads/4446401/normal_601f69e4ed18d.pdf
    • http://sarupunojupud.sportsontheweb.net/vapovadironebagemawupuv.pdf
    • https://ninujesifig.weebly.com/uploads/1/3/1/4/131453022/redijixuwusudij-repakepanase-zegipofof-dasugakawuler.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/fodose/78545223555.pdf
    • https://s3.amazonaws.com/tapexiw/kukerafapip.pdf
    • https://uploads.strikinglycdn.com/files/f86b4bc9-787d-47bc-a9f2-59316a1373fb/boletus_edulis_sauce.pdf
    • https://uploads.strikinglycdn.com/files/241be918-db6b-4e82-b616-8ab13b05909f/gurorum.pdf
    • https://uploads.strikinglycdn.com/files/9393b7c7-2e54-4a96-99af-61ad801c34a7/16871017534.pdf
    • https://s3.amazonaws.com/tosego/foloduwesalaxagirunaj.pdf
    • http://rixuroruwe.myartsonline.com/12_cranial_nerves_and_function.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef03.bin
1f49d4d935c73bc08de89aed3e8a7bcd4e960e903e6036211218428b4b8100b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 5624 bytes
font_01_sfnt_off000101fb.bin
53ebf46b19a2cf4201751bc44873844b88b0952a34536b360acdef568a06daa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 10468 bytes
font_02_sfnt_off00012629.bin
6a7e8c1a65ef48aa7a419952c3af85a61ad34ae59111fef2a03141757ee83e2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 4400 bytes

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