Malicious PDF — malware analysis report

Static analysis result for SHA-256 f886f27db67d86d0…

MALICIOUS

PDF

87.4 KB Created: 2021-03-21 06:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 657142ed8377558b687eaad2eb1e4c80 SHA-1: 254f942a58850557e98158c73c6706d34cb88ffa SHA-256: f886f27db67d86d0c03c690ec8b75f46965a7717842b3b28e9f7d05c5a6fb0b7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a lure for downloading further malicious content. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely as part of a phishing or credential harvesting campaign.

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://ponafet.ru/wix?keyword=student+exploration+stoichiometry+answer+key+pdf
    • https://cdn.sqhk.co/pigexebobe/Giaqfbg/bullet_time_bounce_patched.pdf
    • https://cdn.sqhk.co/wakivunet/bnLICgB/mcdonald_s_near_me_opening_hours.pdf
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdf
    • https://cdn-cms.f-static.net/uploads/4408993/normal_601c8e2fac00b.pdf
    • http://fibutogu.mywebcommunity.org/manosemixujudezadagutu.pdf
    • http://xidasetetobuge.scienceontheweb.net/uppababy_vista_v2_black_friday.pdf
    • https://cdn.sqhk.co/kopilixa/fyZijqI/xonidolameverudi.pdf
    • https://cdn.sqhk.co/vujenibolo/jVidmib/zazobotiwu.pdf
    • http://wapividazofar.scienceontheweb.net/pdf_ausfllen_programm.pdf
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd679dd07aa5.pdf
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5fec2bda95ce5.pdf
    • http://memisada.mygamesonline.org/all_marketers_are_liars_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rejiner/57348422306.pdf
    • http://seterawexasubo.epizy.com/reinforced_concrete_design_beam_examples.pdf
    • https://s3.amazonaws.com/pukaridimupo/the_course_of_love_free.pdf
    • http://jigisasamupor.onlinewebshop.net/odisha_map_file_download.pdf
    • http://rowomasogig.epizy.com/13749076880.pdf
    • https://s3.amazonaws.com/jeromopelurab/53372473360.pdf
    • http://midelex.epizy.com/tojowalavawefejededatule.pdf
    • http://pesetunal.onlinewebshop.net/data_structure_and_algorithm_tutorialspoint.pdf
    • http://vilatelisoto.onlinewebshop.net/99123020205.pdf
    • https://s3.amazonaws.com/tumuzu/53886191025.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_off00011435.bin
817e9c8167d9a73b14c63eaf88120c6cda9b13dec2fa09adbdc99c7c002359d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11435 5824 bytes
font_01_sfnt_off000127f7.bin
ce78d28671f540cc8a002fa89c2a08bd116f15abd9177dac1723cc4a481efa20
pdf-font-stream PDF embedded font (sfnt) at offset 0x127F7 11380 bytes