Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f20a27f8a148fa…

MALICIOUS

PDF

76.1 KB Created: 2021-05-17 00:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 255b83af12e2fd281522d6858566086a SHA-1: abaa8904a45125db5b2fe7f666b88dde91a75af7 SHA-256: 95f20a27f8a148fad6829f92138abdad0411877336aadd657152e52affd5cd10
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9998

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://maypoin.ru/strik?utm_term=outlook+2016+pdf+preview+handler+for+vista PDF link annotation
    • https://cdn.sqhk.co/fuludasowipu/iclcOhe/sharper_image_camera_binoculars_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/heGRjdU/barbie_dreamhouse_adventures_characters_age.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/6jdBphf/zuwadorupilafafe.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/i79gdwo/houseparty_games_how_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/jab6JTb/surekefixez.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/wezaxawad_tovedapoxarik.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/hcjhbZy/pujavofixagajekiwupo.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/hiFx7jZ/gofomepomifubom.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/HRSAmhf/pedorisezi.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/RlgVuid/nifejozij.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/bnbicgd/playtime_swapped_mania_scary_angry_math_teacher_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/icjjje2/house_flipping_business_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/vomuvojovi/Hjengip/digital_marketing_strategy_vs_tactics.pdfIn PDF document text
    • https://sivabukejiwija.weebly.com/uploads/1/3/4/4/134459056/gabizokegupobivexuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/hdChcji/paycell_kart_fiyat.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/vipinib/lewis_charlton_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/prepositions_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/wuzupojul.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/51837014273.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_off0000e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78A 5852 bytes
SHA-256: e9bda145a5133bc60a56c7940436d1a4770861c483f42d49e7d81a77141016bd
font_01_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 12712 bytes
SHA-256: 4f134b8051bee6dc2f7a028cbcfa97b5fe9b2133dcdedf966a0a2a6f6dc7ad37

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