Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b79b0d0a134018…

MALICIOUS

PDF

78.2 KB Created: 2021-03-29 05:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7f42bd8b4867898bfef4f907246692b8 SHA-1: 18e6e7dbc1fa361200e827dda1b0b150a7c476f1 SHA-256: 92b79b0d0a13401870e24a9ccaec8e6f904d331fd4353626e1bcd8bd4239ab46
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 0.9990

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://baarspo.ru/award?keyword=anemia+y+desnutricion+infantil+en+el+peru+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476564/normal_605355382583f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_60177f067552f.pdfIn PDF document text
    • https://cdn.sqhk.co/zirixegip/cKgd3jf/monster_storm_2_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456982/normal_6026bd8bec16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_600c812d4bf3a.pdfIn PDF document text
    • https://cdn.sqhk.co/wevavagu/hidFhb0/cover_hunter_3v3_team_battle_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478669/normal_5feb64b02f8e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375077/normal_5fe4426aedaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_603621a9dab9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_6054e32270def.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/VUysTja/temple_run_2_download_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_604ba2b6e23a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_6018d837943c2.pdfIn PDF document text
    • http://rejudatawenu.iblogger.org/the_grinch_stole_christmas_poem.pdfIn PDF document text
    • http://jerikedora.iblogger.org/black_skin_white_masks_introduction_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/bgdhahe/boomerang_app_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_603a00fc53ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_600ea2705bfff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fda47f18133e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a831080-1a97-4a9e-9b8f-062fc1f3780e/56088943094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c5368e9-7166-4007-b4ea-3632e0f90c52/sazive.pdfIn PDF document text
    • http://votofeki.epizy.com/violin_sheet_music_easy_songs.pdfIn PDF document text
    • http://jopubiv.rf.gd/who_is_lady_gaga_dating_may_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23be1eda-20ff-49b5-8f6e-2bb1fbf9d80b/nobufiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b19102-3a2f-4edb-b68f-b024fbcf569b/3375509866.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5392 bytes
SHA-256: 7ef46f46bc6b711dcbd817c6e63fe50423f7c55fa7354a4c6ff4f1ade99ab78f
font_01_sfnt_off0000ff5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5C 12828 bytes
SHA-256: 5c93ab8a9d682bbb282f24782afdc8a8a8a8af3b7a7f0f748aecc75469986a67

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