Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47b72ca5f641765…

MALICIOUS

PDF

84.7 KB Created: 2021-03-30 21:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 20c9c3ab93dbe39f2056c64e56c0cb8d SHA-1: f7e1f086cc405b409fe5ec38b97a421616ae2c90 SHA-256: f47b72ca5f64176550fa184a8da789c5f59a9a4f7eb38cd7ae1712edefc59244
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm, indicating a phishing or malicious intent. The embedded URL, 'https://midufefew.ru/strik?utm_term=ice+breakers+for+virtual+meetings+elementary+students', is suspicious and likely leads to a malicious site. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to 'ice breakers for virtual meetings', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://midufefew.ru/strik?utm_term=ice+breakers+for+virtual+meetings+elementary+students PDF link annotation
    • http://peludofnor.fun/cute_anime_girl_with_white_hairp11xl.pdfIn PDF document text
    • http://pedron.fun/bteup_revaluation_form_last_date_2019beuuc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_77f80bc2ceec4be598f7258cb2bfb34b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/ruwoxirizewipiwalef.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/reading_linear_graphs_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/zexilepalugewiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/where_is_the_usb_port_on_a_jvc_tv.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_3d7f3332edfe4875b3907345025cc69d.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_1277d8c5817e454aa31d8566bb0f2829.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/kitchen_aid_superba_oven_door.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/shure_ulxp4_wireless_microphone.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/c_spine_injury_guidelines.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_eecf2eb06aaf48ccb7245cccd180b5a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebokizez/born_a_crime_epub_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/introduction_to_data_science_rafael_a._irizarry_free.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_f7c8931c294a455190e1505de2aa143c.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_101268ac37824d2381454cff32408746.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jagux/81091598888.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/email_templates_to_real_estate_agents.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_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 5528 bytes
SHA-256: e9ba6f84f4f52d1fe4e11e1a7a450126d21aab3f4cd440f6061152a30e8c7acd
font_01_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 2576 bytes
SHA-256: cd143c66147c24b0fc9329e2c3fc80dddae98fe83db689c78449e715ec780a56
font_02_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 10436 bytes
SHA-256: 97704186c6da6b7135f7161339c82714168f780b9002b9f787be0eb27044bac8
font_03_sfnt_off00013455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13455 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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