Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e1b32c8edd20ea…

MALICIOUS

PDF

81.4 KB Created: 2021-03-23 10:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f51c94ea6f7e14d3cb865433c371357f SHA-1: 527e50f136edcb59c541e16b3310487d1842eae1 SHA-256: 84e1b32c8edd20ea96ac9199ae18be62cac6a9929d8f2708c1d61db6874b97a7
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 0.9995

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 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://fokemale.ru/wix?keyword=age+of+war+unblocked+games PDF link annotation
    • http://xuxuxib.iblogger.org/lagu_bunga_bunga_cinta_dude_harlino.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/gcjfqkA/54638472651.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/hXVijjd/how_to_activate_assistive_touch_iphone_8.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/hpTgcjj/83979651219.pdfIn PDF document text
    • https://cdn.sqhk.co/mikibitugusu/hgib1id/39409963829.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/ZDFggib/emergency_room_doctor_salary_chicago.pdfIn PDF document text
    • http://rerolakareruxom.22web.org/86801878403.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/0qgeig7/sniper_ghost_warrior_3_best_sniper_rifle.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://uploads.strikinglycdn.com/files/856d2cce-5b98-4e89-9129-089f484d2d1c/matlab_online_course_edx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a497a249-6284-4e80-803d-72b2ee7e3a24/12778689916.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/nonewuretokuvivin.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_11d0e06f781c44f48a414d4d69dc6c07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/mozamepiruwugol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0881f8ed-33c9-4852-b5c6-bc96cb982663/xurumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54a46f67-f65b-4713-bf1b-3638965b6bc2/asesora_de_lactancia_materna_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/what_to_put_on_resume_for_skills.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_71f50b3951934eb38343cd6c7ce7deec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/72509551461.pdfIn PDF document text
    • http://vumafovixono.rf.gd/58550557701.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/best_lower_body_stretches_before_workout.pdfIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_141f94a0aa454bc680064470f4c5a3f6.pdf?index=trueIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_8c44794435d544189a015b9bee94c1c3.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8C 5380 bytes
SHA-256: bad347e45471d96d5bbdeecdba15fa0adf0566903064745f5c185e468ef7e7f7
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 12068 bytes
SHA-256: 6354204ff7e8cda920bc9b68fa6b806d8b7a7ae8649a0d4e695c80fcaea7408c
font_02_sfnt_off000128bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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