Malicious PDF — malware analysis report

Static analysis result for SHA-256 d856d8b636e6deee…

MALICIOUS

PDF

87.6 KB Created: 2021-02-27 08:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f02eb527ccf2db2c0903d4ce8daac44a SHA-1: 4bdb5fd92d55aa87f11fda253bbb90492e4d5089 SHA-256: d856d8b636e6deee798edb89b598669d327a51123e67af0c49ed5f0f535abd36
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/award?keyword=what+can+you+do+with+apple+tv+3rd+generation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407057/normal_603433c2d2fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_600e0aea26ff3.pdfIn PDF document text
    • http://kupidarinab.22web.org/free_card_making_s_decoupage.pdfIn PDF document text
    • http://vitezozikupu.iblogger.org/xurikat.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/intermatic_st01c_-_in-wall_timer_manual.pdfIn PDF document text
    • http://gidaxajigim.22web.org/lagan_college_inspection_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_602c05a96b5ab.pdfIn PDF document text
    • http://myyshooop224.site/factoring_polynomials_quizm5cio.pdfIn PDF document text
    • http://minomesiguziv.22web.org/how_to_say_raven_in_spanish.pdfIn PDF document text
    • http://chaptejvxz.fun/pivopivrvbuu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutagokakaki.rf.gd/81445519249.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/battery_bar_basic.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/are_stocks_worth_investing_in_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/blitz_brigade_hack.pdfIn PDF document text
    • http://welidigukiru.epizy.com/r_studio_tutorial_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/italian_accordion_music_s_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/free_coloring_sheets_of_butterflies.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/fallout_2_technical_manual.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_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 5588 bytes
SHA-256: d22e1aff7687a048e04ec31e5824316738f46b3375a3189453d8714aa49ce81c
font_01_sfnt_off00012cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBC 10644 bytes
SHA-256: e01a01a1a525a7d11f7e2f008636712acc3cecd4dd099f8d1b746b4c6b7a52ff