Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4564f324ee37a81…

MALICIOUS

PDF

77.1 KB Created: 2021-03-28 22:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003c577524c296601e08483f4c618515 SHA-1: b119801c789291de7ebee61eafd58679017a61f1 SHA-256: e4564f324ee37a81db796825e0ef663c6ee092f7d5299c2942bcd4d92d7a602e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojanized PDF. It contains multiple embedded URLs, one of which, https://jumiwimov.ru/123?utm_term=bluestacks+3n+button, appears to be a lure for a software download. The PDF structure and embedded content suggest it's designed to trick users into visiting these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=bluestacks+3n+button
    • http://woxijakuzadajew.getenjoyment.net/home_maintenance_schedule_checklist.pdf
    • http://nelilovodik.scienceontheweb.net/basic_english_grammar_rules_free_download.pdf
    • http://qwertyujg.xyz/nimoxofojuzarukuzoxafejr88wn.pdf
    • http://lozuzaragujeb.mypressonline.com/25307439923.pdf
    • http://lorakuze.sportsontheweb.net/1160879643.pdf
    • https://winudepawo.weebly.com/uploads/1/3/4/1/134132470/soxesojute_jexozog_bolubovojujezas_solan.pdf
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/gatadezaderix-timil.pdf
    • http://rejamar.sportsontheweb.net/goxutusidalepa.pdf
    • https://fobijolosa.weebly.com/uploads/1/3/4/7/134730704/8061b8c91.pdf
    • http://lavkavkusa.store/7637953602693jd1.pdf
    • http://xumupizaxuto.scienceontheweb.net/daxovire.pdf
    • http://jakusavu.sportsontheweb.net/chlorination_of_alkanes.pdf
    • http://govuxojikasumot.scienceontheweb.net/vefexej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gekixadonuru/80514064807.pdf
    • https://s3.amazonaws.com/vexosafugunu/diraladuj.pdf
    • https://s3.amazonaws.com/bokofapig/adobe_after_effects_templates_videohive.pdf
    • https://s3.amazonaws.com/daraniwekamidir/minuvufewi.pdf
    • https://uploads.strikinglycdn.com/files/ad65e565-62a4-4021-9648-ad9bf7d18826/47110804193.pdf
    • https://uploads.strikinglycdn.com/files/3799692f-0fc2-43f7-8b9a-0224af4bf0a6/percy_jackson_and_the_olympians_the_lightning_thief_graphic_novel.pdf
    • http://gukutimaguvuzum.onlinewebshop.net/kitchenaid_superba_microwave_light_not_working.pdf
    • https://uploads.strikinglycdn.com/files/8109db71-7b6c-4a24-ac7b-91ad2f0ebf41/98860132291.pdf
    • https://s3.amazonaws.com/gidibesuxi/how_to_write_a_chairpersons_report_for_an_organization.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_off0000ef05.bin
1f872edf5c0fbb799387a2b8cc860cf92ab41c8bb08e0c9641b65688e9f5f19e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 5112 bytes
font_01_sfnt_off00010082.bin
7501b43df675be9e591c5e0ec910101e0a6b8e34cd2f258fbc78c4cc1fc68cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 11028 bytes