Malicious PDF — malware analysis report

Static analysis result for SHA-256 46844c7568a72099…

MALICIOUS

PDF

67.4 KB Created: 2021-04-07 20:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5f8322d23b131376cde4490d3b4c20e0 SHA-1: b25e97f2e1767d78229d82f1c517a7444e8e6f93 SHA-256: 46844c7568a7209946fd9ac849c269c7a742c5664460f4c332877cae9ffcb0c9
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://vilenefex.ru/123?utm_term=cranial+cavity+crossword+answer', which is likely the primary lure. The document body, though heavily obfuscated, suggests a 'crossword answer' theme, consistent with phishing or social engineering tactics.

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://vilenefex.ru/123?utm_term=cranial+cavity+crossword+answer PDF link annotation
    • http://jerugujekema.getenjoyment.net/adhikarana_saravali.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/70982769832.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/lajeriratifojowozomanab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb93e840-fd32-4381-b71c-2c5d3b3e3f21/north_carolina_dmv_permit_practice_test.pdfIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_1c88e778a0b540a1ae9747a8aca072d4.pdf?index=trueIn PDF document text
    • http://bexukavibume.myartsonline.com/27954620887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cead5319-b593-4099-80d2-2bfbc42beb66/eckhart_tolle_the_power_of_now_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/where_can_i_buy_pantone_paint_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/performance_air_intake_systems_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/chocolate_chip_tracker_bar_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/santa_letter_templates.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_c18762f9271147e2860fbb4eb5aa4821.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/anansi_and_the_moss_covered_rock.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_219a1498d621479ca741b5b1c3c6ff60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/agnes_of_god_monologue_martha.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/sample_descriptive_paragraph_about_a_place.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/film_benyamin_biang_kerok_2018.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/tidakevebok.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/multiplication_tables_up_to_30.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_off0000cd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD24 5092 bytes
SHA-256: 5d8235de5471261522af52203aea9067ef47fefddd07ee10521093152c8f726c
font_01_sfnt_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 9972 bytes
SHA-256: b80ef72fe15674e721ba7b7e771a9476e8082c3ca0e2bf1fa2145a0fcd2d2861

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