Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ca6a8f2630ae0b…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 09:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a177f8738f2fd0a58b0a816f40487fbb SHA-1: 5d1a48505050ea77b36caf20fa8fd60a25e1e101 SHA-256: 85ca6a8f2630ae0b57fbd9188f8bb50bcd40cd438fe0242b78d5c13a6f55ffd3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a malicious redirector link disguised as a poker hack download. The link points to a known malicious domain, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=dh+texas+poker+hack+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_600bbe2e99b85.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/y5jcgiH/used_airplane_for_sale_by_owner.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/ibuifib/rayman_fiesta_run_download_android.pdfIn PDF document text
    • http://rutefozur.22web.org/kebil.pdfIn PDF document text
    • http://jarisudowapebi.sportsontheweb.net/8th_grade_science_worksheets_with_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491398/normal_5fd348f770447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369917/normal_5feef4e2697d1.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/microsoft_office_video_tutorials_free_download.pdfIn PDF document text
    • http://garant-ritual.online/kexumuvedarepofuravnb1hp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_5fd10fcbc1532.pdfIn PDF document text
    • https://cdn.sqhk.co/nozesinipi/fhhEjdD/free_download_mp3_player_software_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/6ghKheQ/6130030104.pdfIn PDF document text
    • http://fejalakifuvotux.iblogger.org/jorozepagasevewod.pdfIn PDF document text
    • https://cdn.sqhk.co/sapidefapo/geDPjO5/pegokavujitigafogo.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuzodopuvu/ghjjbhe/five_nights_at_freddy_s_unblocked_3.pdfIn PDF document text
    • http://circleshtang.xyz/digimon_world_3_training_gym_guidermme2.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/eihhfja/27118520641.pdfIn PDF document text
    • https://cdn.sqhk.co/nudadubuju/hcQEa5p/xoxigeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://masusoxowep.onlinewebshop.net/competition_car_aerodynamics_3rd_edition.pdfIn PDF document text
    • http://dapuseda.rf.gd/the_game_changers_diet_review.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_off0000f0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C6 5412 bytes
SHA-256: fd05d317f805d7ce66d343f4a41d6101b6a1063dcd19ad314fe20b9efaf267f8
font_01_sfnt_off0001030d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 12248 bytes
SHA-256: e3ef9b471c5bb7e473d62b49555248b49ee340163c7d3cf3b8a3f5310a232caa

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