Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ca2e378701482c…

MALICIOUS

PDF

73.5 KB Created: 2021-02-05 11:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6a1fa2ca23ca8be29780ddb1bd941003 SHA-1: fa6c1363dfe08b02961afdb76dfed14900b6d88a SHA-256: 17ca2e378701482ce992f48a2e38c9830288cb876d1963430fe3efc8ba8fbfc5
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 part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=personification%20worksheets%20grade%204 PDF link annotation
    • http://nutristrike-shop.ru/74696956073q840n.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/iiAgjha/67548288787.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/8rFgOjb/xigapewejebabikejev.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/cjeTjfn/fozuxaxilivu.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/oEjhehd/world_history_definition_of_secular.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/zgisijl/word_of_the_day_with_meaning.pdfIn PDF document text
    • http://nelitip.22web.org/kuzifogog.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/8K1Oiib/mars_colony_game_free.pdfIn PDF document text
    • http://dukozodi.iblogger.org/motidaserako.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/jcWjfjG/66797989215.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/hbmjg9U/arijit_singh_best_songs_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/XdgilwJ/mosajusadebowadonef.pdfIn PDF document text
    • http://kind-insta.site/vatonukodasiditezakotoou9qs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 5496 bytes
SHA-256: b45f615124f06b58b88b0a6d224f6e4a997e187d5354aa2a4bb58f4dc124030c
font_01_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 10492 bytes
SHA-256: 1dd6424c8581bfedb37aad4715945831db8e92c81c4ba399c51cb81a5987249c