Malicious PDF — malware analysis report

Static analysis result for SHA-256 822533c3be546bb2…

MALICIOUS

PDF

73.7 KB Created: 2021-03-20 18:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 03d9ada9d1633080b1b2b934b806102c SHA-1: b01b6af05e99b6d0d0f0925e78392fd8d737b8af SHA-256: 822533c3be546bb2da059141152bca816c20d6f3108e3a8d9a6bb5ad412b3c41
126 Risk Score

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-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://xajibur.ru/strik?utm_term=price+of+casio+ctk+2400 PDF link annotation
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/6586232.pdfIn PDF document text
    • http://narelavupes.22web.org/bopesajixekazuvodeju.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/0R4gcie/radiation_island_mod_apk_free_download.pdfIn PDF document text
    • http://gitaxodepa.iblogger.org/wiwonaxibapiripewawesiwe.pdfIn PDF document text
    • http://sozaxasofurem.22web.org/mens_belt_size_guide_cm.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/iiJgjrv/wubejupejawubum.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/nikaju.pdfIn PDF document text
    • http://nowemuzasam.22web.org/months_of_the_year_worksheets_grade_3.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/eejdlSi/can_you_tile_over_knockdown_texture.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/7509524.pdfIn PDF document text
    • https://tolutewegudef.weebly.com/uploads/1/3/4/0/134097468/xivemutu_lupuwu.pdfIn PDF document text
    • https://gedodigu.weebly.com/uploads/1/3/5/3/135312539/nidejufagaruwu.pdfIn PDF document text
    • http://tenumuxuw.iblogger.org/99817737566.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/aQYshij/blank_movie_box_office_report.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/ikjiIhj/framework7_icon_cheat_sheet.pdfIn PDF document text
    • http://papewakoj.22web.org/389498528.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/semuxemakaw/14180539524.pdfIn PDF document text
    • http://pepabalexesoge.rf.gd/hbo_episode_guide_game_of_thrones.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/oreo_cookie_phases_of_the_moon_worksheet.pdfIn PDF document text
    • http://nenilezum.epizy.com/49735294321.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/badger_5_garbage_disposal_user_manual.pdfIn PDF document text
    • http://nadiripu.epizy.com/biostar_handbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/pyromancer_dark_souls_1_guide.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_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 5268 bytes
SHA-256: f2a46bbbc1fda1bc85ec3cc7c240027250f1b4e9347f896e5f870eb245f4e201
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10900 bytes
SHA-256: 9614c896dc49cc1f0a2d359ce1b315ab7ca167971533e7e6d5faf6cb9101825a

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