Malicious PDF — malware analysis report

Static analysis result for SHA-256 9872ff3d20854621…

MALICIOUS

PDF

79.2 KB Created: 2021-03-25 01:21:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f0a71f8c6fc0fdcf08ffbc03a3787ef SHA-1: 73e4308cb35e724639a05fc773b0c895f4d69c2e SHA-256: 9872ff3d20854621c259df0949af45ade8d1bd48df44693d307cda989ea9fbaa
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 heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, suggests a lure related to 'triangulation worksheet answers'. The primary attack vector appears to be directing users to malicious URLs, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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/wix?keyword=triangulation+worksheet+blm+5-9+answers
    • http://poopo.ru/graco_snugride_30_lx_stroller_manualpoes7.pdf
    • http://socialwave.me/detobuvajaxekut09e2z.pdf
    • https://bisobozewex.weebly.com/uploads/1/3/0/9/130969373/8b9fb4.pdf
    • http://salonhq.xyz/gudewutararupevwlxcu.pdf
    • http://table-wait.com/rotagomajekuvukitegisa4yr5m.pdf
    • https://vipagavufedolaz.weebly.com/uploads/1/3/5/3/135350232/vitipozikimogat-mejinojozis-tupabun.pdf
    • http://vorgazme.com/86208589240i5jnn.pdf
    • http://glasshookahcatering.com/senosizemanedumezatp857.pdf
    • http://tixaman.scienceontheweb.net/hernia_umbilikalis_adalah.pdf
    • http://sazulido.medianewsonline.com/carrots_nutrition_facts.pdf
    • https://kamedewogivazu.weebly.com/uploads/1/3/4/0/134096977/raduba.pdf
    • http://zhk-rekord.info/vilotitavumupinanosoditopdd3xz.pdf
    • http://wumomotetidofe.getenjoyment.net/high_school_biology_book_miller_and_levine.pdf
    • http://mmmuuuue.space/remington_700_vtr_308_reviewnd2l5.pdf
    • http://zanartcc.net/11739221312hcss2.pdf
    • http://gonzo-3d.com/mubaligejadeperimuxok9q6rm.pdf
    • http://gigezesuzobe.getenjoyment.net/west_bengal_panchayat_election_result_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa2865bf-1135-4f42-9144-0404c2ce4d2a/51817986791.pdf
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_cd5b3990b5de4dc9ae3840d45c2f1f00.pdf?index=true
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_2028536c3a2744dd8202f07c3b1d6a1f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bcd2c801-5dfc-4499-a23e-aefb7a6d7b51/how_to_bypass_emergency_brake_for_dvd_player.pdf
    • https://99b08629-27b2-41dd-83a1-938dc2ca35bd.filesusr.com/ugd/067ecb_7861d800efc442769e05e8399fe3a6fe.pdf?index=true
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_418b3868bea6433683ff9c8f857b3746.pdf?index=true
    • https://uploads.strikinglycdn.com/files/964a8014-f105-48ed-bbe6-f956f94c143d/kenwood_kmm_bt312u_miswiring.pdf
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_8fd39854c2ab49c79ecb0de166890add.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e933fa39-6f7b-4272-8e08-a14fcf18b8ea/milefivi.pdf
    • https://uploads.strikinglycdn.com/files/e81d98ff-5a55-414f-9859-35692d171091/what_does_being_on_cloud_nine_mean.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_off0000f69b.bin
02ef4d7aa5427d45092b6e153eece8cf364958aac5f27204938bb02f371b1e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 5656 bytes
font_01_sfnt_off000109cb.bin
4e634fc9138004f45ea86b064048f292b386a1b8e88e50f0a72b64ee89ae121a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109CB 10792 bytes

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