Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e874ac281a12b0…

MALICIOUS

PDF

80.2 KB Created: 2021-02-21 10:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 97299810feb4a8a4b026378f7d6d3d7a SHA-1: 26605fb7e3e1bbd489d772bccd04584653be517b SHA-256: 66e874ac281a12b0d7547940a96450e8f3701347cd2be7f17ffd1cdc3c074298
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An embedded URI points to a suspicious domain, 'maypoin.ru', which is likely used to host a malicious payload or phishing page. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=sri+rudram+chamakam PDF link annotation
    • https://cdn.sqhk.co/regisanozoxo/fcY6ZrR/24128610390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_5fd1df53e1ca7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcc365b99fe1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/jovekus/habit_tracker_printable_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/atomic_theory_short_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/sotavijizimelisumexureke.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/deal_sheet_law_firm.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/best_online_car_racing_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/zoduk.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/wow_classic_warlock_pets_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/42647254761.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/bomb_calorimetry_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/89501363853.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/afib_guidelines_esc.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/sejukejijelutudupoduj.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/xasexuwuperubifokuga.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 5136 bytes
SHA-256: 176fc2c59a0e51ef0b2fbccfc84f48d21101a5a1d4029763421517e18e4c6d49
font_01_sfnt_off0000ea44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 6924 bytes
SHA-256: 1b2238897df280e2825bf7592edaea506399ab9ed1e85ebdff78a8b8957f6642
font_02_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 11356 bytes
SHA-256: 9061939b82e28c86a65ae9bc414dd0cfbc0e787c74c5c2fcbcb3db0f61b0eb13
font_03_sfnt_off000126ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126ED 2972 bytes
SHA-256: 98b1dc2c9753350417c3e415a62aea3f6035bce9f7a5e95169a5289bd4ade3f3

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