Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c65b1852d84620…

MALICIOUS

PDF

72.8 KB Created: 2021-03-27 16:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 159c0be03341fe7dec144b47d7d7428c SHA-1: aa102fb82f8230e4731d6aeafdf099ddab6cff99 SHA-256: d7c65b1852d84620ab05b874f23e696ba0cb2049c13c89d79318c5caa12fd733
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL likely leads to a phishing or malware distribution site, attempting to exploit the user's interest in 'valentine day 2019 images hd'. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

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://gimoguvi.ru/123?utm_term=valentine+day+2019+images+hd PDF link annotation
    • https://cdn.sqhk.co/divojimo/ggCiiij/lukadopipirilogumudile.pdfIn PDF document text
    • https://cdn.sqhk.co/wixakulu/bRzBchf/14381339774.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/zjdgc12/mtc_bus_rush_hour.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/iiihahi/byju_s_learning_app_free_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/5ijajb5/images_tv_over_fireplace.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/chc0eUy/28538052810.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/icHZRia/2006_fifa_world_cup_penalty_shootout.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/hignFjg/infinity_train_characters_ranked.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/zaxawetawupo/90938642638.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/navien_240a_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/kijavivilowovoro.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/79364479637.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/rasurolofajiwibum.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/21084707561.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/27517203275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bfc267-0ac9-4cee-aa54-255004143ca6/another_word_for_solutions_oriented.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2a27f6-223a-4ef6-a9b0-4f02017c1e18/star_trek_discovery_season_4_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/ditukidefarikidabetem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd894bd-2473-48ae-ae51-dd5316348b8a/pabugebaruzufoji.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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 5692 bytes
SHA-256: a454eaaeadb82b844485c0294372c88f7eba82b7c945803f37353569a118ecb4
font_01_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 10648 bytes
SHA-256: 57523d8437d965f5c9f616b16742b9fdb4efbea5f5ff5154c39b335666c9f91e

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