Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aca16679f1d33f0…

MALICIOUS

PDF

101.0 KB Created: 2021-03-02 23:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9806b7ac7988fb3ce626f7dcb15f4200 SHA-1: 94bb1517d35f29c59b926452c2e241a005a5164e SHA-256: 1aca16679f1d33f02fd0b09af27adc39f816ca120bec96e4d7451af87813ecb2
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are dynamically generated and point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary external URI, 'https://nipisod.ru/wix?keyword=pathfinder+2e+unarmed+fighter', suggests a phishing or SEO poisoning attempt to lure users to a malicious site. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'.

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
  • 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.
  • 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://nipisod.ru/wix?keyword=pathfinder+2e+unarmed+fighter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454184/normal_600dbf2ab94d2.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/egiihfs/cloud_poweramp_visualization.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizajo/YTAnjhE/airthings_corentium_pro_radon_detector.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/hbjkzjc/90s_tv_show_quiz_buzzfeed.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/fbfe4733fd870af.pdfIn PDF document text
    • https://kesizibewasi.weebly.com/uploads/1/3/0/8/130813921/juvemowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_602ab62e459ac.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/pakebedowov.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/gdSPgL9/scratch_geometry_dash_world_toxic_factory.pdfIn PDF document text
    • https://kunaxujo.weebly.com/uploads/1/3/1/4/131406864/95ddc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448718/normal_5fec3fc5c4ddf.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/sugowubuf/93721639563.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/3d_games_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/why_is_my_dymo_labelwriter_400_not_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/20353348856.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/char_broil_electric_grill_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/cryptococcus_reportable_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/uniform_crime_reporting_handbook_2016.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_off00015067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15067 5244 bytes
SHA-256: 210ebd65dafd9c6b3e269dee624de752afd0838345efd8622d374588289f73e8
font_01_sfnt_off00016214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16214 10696 bytes
SHA-256: e9b5e611f863d862acd9a8b63569b4910ca47d5508f5d5ac8d32ffc3e9befcd8

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