Malicious PDF — malware analysis report

Static analysis result for SHA-256 474dbab46c1132a0…

MALICIOUS

PDF

105.2 KB Created: 2021-04-07 22:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 327a694315a09875b2e7fad0b5079dc3 SHA-1: 7f30ebdfd6669a5d7c2aca6685c3aa6a74236cdb SHA-256: 474dbab46c1132a043969195a8f5776fe15961d831551a9fa7751b44f1e9b96a
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to CAD software, directing users to a suspicious URL. The presence of embedded URLs and the overall detection by multiple security tools strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/strik?utm_term=how+to+add+seismic+load+in+staad+pro
    • http://winsl.space/183590243740ztgu.pdf
    • http://detonic-italia.website/7326020434u3ik6.pdf
    • http://denufetuk.iblogger.org/wibeson.pdf
    • http://revukajazoweku.22web.org/scotland_the_brave_piano_sheet_music.pdf
    • http://medicinfo.online/masesugatumigina6z.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://rewaxowaf.22web.org/9292013905.pdf
    • http://dakiravafo.iblogger.org/65011806738.pdf
    • http://goodsfor.life/77690682713u9tou.pdf
    • http://strapslap.online/53868229230rni3c.pdf
    • http://all-host.site/my_talking_tom_2_mod_iosrwmb8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mavafakubew.epizy.com/cdf_of_a_continuous_uniform_distribution.pdf
    • https://s3.amazonaws.com/rizijubovapuk/mabiluvo.pdf
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_86acc61a364643e6a5cbb8fdca64aecc.pdf?index=true
    • https://s3.amazonaws.com/paxunu/wukeribadejogub.pdf
    • http://fapiruligifujo.epizy.com/textile_catalogue_design.pdf
    • http://tumejatamivalu.rf.gd/buku_anis_matta.pdf
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_0513dc1a74084914853e7452b1eefbba.pdf?index=true
    • http://mebimukejupaxix.epizy.com/alkaline_diet_food_chart.pdf
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_035e8959468346baac3e38f23e8ac023.pdf?index=true
    • https://s3.amazonaws.com/makixibawumebol/tutorialspoint_online_java_formatter.pdf
    • https://s3.amazonaws.com/fadadedezeker/solovumapovaj.pdf
    • https://s3.amazonaws.com/lopadivupudexa/what_is_the_best_location_for_a_smoke_detector_in_a_bedroom.pdf
    • http://topawod.epizy.com/gupovijusekiketaf.pdf
    • http://dowijasimenazo.epizy.com/tuxameg.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_off00015061.bin
3abf37c4cfcc11cef153b0beb3da08f3a7efd4194ed5d3849cb5e7cc6f78041b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15061 5060 bytes
font_01_sfnt_off00016182.bin
b4ec76859bb9748d91f146981e69202158a2e0d9f60271789f959c4fecaf19bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16182 11572 bytes
font_02_sfnt_off00018904.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18904 4324 bytes

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