Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d04227c4614ec7…

MALICIOUS

PDF

71.6 KB Created: 2021-03-28 09:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3503b5348f26b1fdcf2d87570224100 SHA-1: 12f7c09b35c24256ab5f81c32af437ff5b549186 SHA-256: c6d04227c4614ec7dea7e38288eaedd2ccb9a59707f725eb316fb0c0bfabb771
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/123?utm_term=avery+template+5160+design+and+print+online PDF link annotation
    • http://de-bewertung-id-q2e5t23.top/mlk_letter_from_birmingham_jail_audio2wh69.pdfIn PDF document text
    • http://ig-about.net/65379889926813qy.pdfIn PDF document text
    • http://vipmanmarket.space/python_camelot_reade2cqn.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/iahiLgc/networks_vocabulary_builder_activity_the_constitution_answer_key.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/pembelajaran_anchored_instruction.pdfIn PDF document text
    • http://csxmoney.info/clear_speech_definitionret2u.pdfIn PDF document text
    • https://cdn.sqhk.co/belebudetub/cGhUc5b/offroad_4x4_car_legends_traffic_games.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jjejjeq/xonogogij.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/15391430379.pdfIn PDF document text
    • http://lngcliente.com/can_you_put_printable_vinyl_on_a_shirt30tjz.pdfIn PDF document text
    • http://gomesuzos.mypressonline.com/broiler_production_zimbabwe.pdfIn PDF document text
    • http://nyvelsets.online/barisojemuzutalakuvuvek7j964.pdfIn PDF document text
    • http://igrarazuma.info/northouse_p.g._2019._leadership_theory_and_practice._8th_edc8xy2.pdfIn PDF document text
    • http://xutusurekawidi.medianewsonline.com/bikini_body_training_guide.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.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/zuwimadaneb/data_structures_and_algorithms_for_java.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/how_to_get_moca_certified.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/how_to_connect_ipad_to_hp_deskjet_3050a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f908b33-329b-4142-9154-c57cbff710bc/patikup.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/19131619630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5357d44-0a84-42bc-87ac-fba5ce59c2d3/factors_affecting_motivation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc99626-0384-40b8-a8e4-2abd899701a6/panasonic_kx-tg9542b__four_kx-tga950b.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/39626649188.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_off0000da0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0F 5904 bytes
SHA-256: 339e07849140ecd6ae2f4dd5396803e4bef7734c1c16f7472f709eee0ee31766
font_01_sfnt_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 10240 bytes
SHA-256: 0a462dc55c13e54ec73dfffa3dbdf1cb251b095c2f2bd93a21fc96a56510a92f

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