Malicious PDF — malware analysis report

Static analysis result for SHA-256 21feea6385ec25be…

MALICIOUS

PDF

67.2 KB Created: 2021-02-20 18:29:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d2f33f7433b5e6526eb52981f38cbffa SHA-1: 4ddac0448e6a6ba9f1ad6bb24dbdb436da8a9fec SHA-256: 21feea6385ec25beeb5582aacaac385c6c1da1cdfbcf35b00af62fb22790f565
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=apkhere+geometry+dash+2.0 In PDF document text
    • http://imm-shoes2.club/21188190871uzb8z.pdfIn PDF document text
    • http://coolvdomaion.online/472717600284eip0.pdfIn PDF document text
    • http://sparzha.club/checklist_for_moving_into_a_new_house5wy6y.pdfIn PDF document text
    • https://manoxumumaxu.weebly.com/uploads/1/3/4/4/134472756/53a40.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/roware/ruxafemofukaxelerubatejep.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/axial_flow_pump.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/chiari_i_malformation_symptoms.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/asphalt_8_money_hack_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/15883931897.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/momazubisarib.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/digital_electronics_gates.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/anjathey_tamil_movie_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/45345710594.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/android_version_8._0._1_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/husqvarna_sewing_machine_repair_shops_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/wojomizutilamogazidiwura.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_off0000ca20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA20 5800 bytes
SHA-256: 5de3de7bca510b2ca7aabda65683917661e0f7d96270c1974bdc0b791c88e4c6
font_01_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 9984 bytes
SHA-256: bca36701c09318a4951b8fe2a369da5ed29eacd8e2405aec12a2227d38b5e1b2