Malicious PDF — malware analysis report

Static analysis result for SHA-256 98370eb4e9d06f25…

MALICIOUS

PDF

73.8 KB Created: 2021-03-10 02:26:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f2883b33d058883c21b9f2ad3bd33a SHA-1: b956bb92c59991e545101b5e4089069968e9c3c4 SHA-256: 98370eb4e9d06f2548e09ec49395bf7e2c7a1d48fba6f34e0e5765343bbe546e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The PDF contains an external URI pointing to 'druttle.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=alphabet+writing+practice+worksheet+pdf
    • https://cdn-cms.f-static.net/uploads/4409095/normal_601bab8cdbcf5.pdf
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/lolozozekozizapino.pdf
    • https://najunores.weebly.com/uploads/1/3/4/3/134381484/fopapapimatozosa.pdf
    • https://cdn-cms.f-static.net/uploads/4387037/normal_6041a71a53fca.pdf
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/0e249d40bd3137.pdf
    • http://micrometerdigital.xyz/jadodifarotijemixin0rlh.pdf
    • https://static.s123-cdn-static.com/uploads/4458840/normal_5fe1a629c5c8b.pdf
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/4559868.pdf
    • https://static.s123-cdn-static.com/uploads/4414500/normal_6002f4cc8b462.pdf
    • http://zuraleres.mywebcommunity.org/xefozijibikogol.pdf
    • http://muwiduvepobuz.mygamesonline.org/anger_management_group_activities_for_adults.pdf
    • http://lnstagram-copyright-supports.com/37904099251vha09.pdf
    • http://bred-enligne.com/folusinati7t3fl.pdf
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/zisotibut.pdf
    • http://fofiwafajelerax.sportsontheweb.net/44483134179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fadudenomo.onlinewebshop.net/weekly_calendar_2020_printable.pdf
    • https://uploads.strikinglycdn.com/files/51b615b7-7cdc-4f1b-abcb-0176c06cf2f4/onkyo_tx-nr709_factory_reset.pdf
    • https://uploads.strikinglycdn.com/files/af3f94be-50db-4185-a5b2-7464f0418bda/xoladixupeso.pdf
    • http://xenezipulugiji.atwebpages.com/wired_for_story_ted_talk.pdf
    • http://kagijido.myartsonline.com/where_to_donate_toys_near_me.pdf
    • https://uploads.strikinglycdn.com/files/c09c9a55-3a37-4fd9-b136-d791d989f187/samozoxepibemagovamapop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35a.bin
ef02a95923b56aab7ff78782751c218a84c0c60c4ded8b90eb0b06cb0effda5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE35A 5700 bytes
font_01_sfnt_off0000f6c2.bin
cde866c5cd6c816b4aa0fc50c009dd3c30c260e3b4c823e3841c43bd01c03399
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 10328 bytes