Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d20dbb0ef31096a…

MALICIOUS

PDF

78.8 KB Created: 2021-04-12 09:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7e5956b9dc5ffb0a7b8e9b2f6e2a3874 SHA-1: edfc965a3321e4a394a9796c562d1f14b91adfae SHA-256: 6d20dbb0ef31096a76fe2ebc215c781108ef24cdc6a6928bec8779b9f3307003
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that directs the user to a suspicious URL, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to interview questions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://leonvi.ru/strik?utm_term=what+are+the+interview+questions+for+excel PDF link annotation
    • https://cdn.sqhk.co/foroboreb/aHhe3gi/usa_bmx_balance_bike.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/iHhfijx/22296747513.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/gJiaggE/41666817396.pdfIn PDF document text
    • https://cdn.sqhk.co/retobumoki/XjfYphf/guxovorejixidezo.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ijgjget/game_of_thrones_cast_season_1_episode_4.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/hegehcw/tetetarupetuzerutode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/punurum/wigelomefevur.pdfIn PDF document text
    • http://xegefonupekowa.epizy.com/arm_assembly_programming.pdfIn PDF document text
    • http://tepuxasimu.rf.gd/hibbeler_mechanics_of_materials_10th_edition_solutions.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/setizap.pdfIn PDF document text
    • http://dixitexajujus.epizy.com/pebigejivixexeviwumujufo.pdfIn PDF document text
    • http://tibuwol.rf.gd/bill_of_rights_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/32404557095.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/is_pubg_banned_in_india_latest_news.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/repair_kitchenaid_refrigerator_water_dispenser.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/foundational_reading_skills_practice_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/doncaster_free_press_court_report_june_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/best_sites_to_movies_on_iphone.pdfIn PDF document text
    • http://vitekek.epizy.com/aleko_sliding_gate_opener_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/past_tense_verbs_for_elementary_students.pdfIn PDF document text
    • http://dinetiwezij.rf.gd/wurugamomofi.pdfIn PDF document text
    • http://zimedexi.rf.gd/example_of_good_cv_template.pdfIn PDF document text
    • http://sufutogikid.rf.gd/gotibedijop.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 5328 bytes
SHA-256: f0ad01e474bb7040e28672d4534e37f3d6d2c6afc80816ecd5b88ca13954bdd9
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 10896 bytes
SHA-256: 77f495e21d8980ae6745bf7c1896cf1e073a57d3d2c7a45f069cedc90c0466a5

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