Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a234d9601e7a5b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-30 00:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 88908c52fe8b2f800f77566e36918b83 SHA-1: a3400126924f334f01447aaddb579f25b83c7a5a SHA-256: 23a234d9601e7a5b7df4b73e4e64ed900f763cd5772fb539d2050373f2ffb1a8
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to the embedded URI, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=storytelling+with+data+pdf+cole+nussbaumer PDF link annotation
    • http://dobewobezusisof.iblogger.org/syndrome_cholriforme_dysentrique.pdfIn PDF document text
    • http://airned.ru/rv_electric_awning_manual_overridelz0jt.pdfIn PDF document text
    • http://pimupafigofud.iblogger.org/autocad_plant_3d_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/dijadive/jfUgdhc/occupational_health_nurse_practitioner_jobs.pdfIn PDF document text
    • http://moneyindia.site/691462792865jm7g.pdfIn PDF document text
    • http://kernig.store/how_do_sbir_grants_work904be.pdfIn PDF document text
    • http://everydayy.fun/interior_decorating_schools_near_mehxkj8.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/gWkjiha/horse_computer_games_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vuvevuzipag.rf.gd/zunesisa.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/netgear_gs608_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91cacf0-cde4-4be1-92ca-c1e7be596d83/formula_estructural_acido_clorhidrico.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/rawegi.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/tatumu.pdfIn PDF document text
    • http://vogonadebemumox.epizy.com/19617360956.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/big_data_analytics_tools.pdfIn PDF document text
    • http://widiximiz.rf.gd/jubedewumobewavadiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0e364d-d120-492d-a293-bfd5bed4c13a/fomelujikas.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/chaupai_sahib_path_audio_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 5888 bytes
SHA-256: 2fe4cbe81caeaeb13a49d56435e1204874adb817dde04f5198cf999116ac6047
font_01_sfnt_off00011c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7A 11008 bytes
SHA-256: 14d510cf31976671e08c04846e285672dbf24aa9616b10a5d20036ae83e19217
font_02_sfnt_off0001421d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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