Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26fbc74bd402b41…

MALICIOUS

PDF

83.6 KB Created: 2021-02-12 14:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f0197623842c94d444aa871c4dc79d34 SHA-1: e6c5edbb24dca256d864212ab20c3e7e16115e17 SHA-256: a26fbc74bd402b41b382d9508b1b6621a3808f3db9cd4fa7e3ddbcd2e06f435c
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=port+of+charleston+cruise+schedule PDF link annotation
    • https://cdn.sqhk.co/xopigotax/jchcCgf/color_picker_html_css_js.pdfIn PDF document text
    • http://shoppingyxplus.xyz/sonic_4_ep_1_mod_apk_datamcklk.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/begodenideg.pdfIn PDF document text
    • http://reawont.online/ibn_taymiya_booksa7zkf.pdfIn PDF document text
    • http://detonic-hypertonie.website/9580573550s3cr3.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/96493994711.pdfIn PDF document text
    • http://italdom.fun/55085206506fpt9j.pdfIn PDF document text
    • http://zevixoleg.iblogger.org/joxerirupav.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/dFja2dl/hillsong_y_f_end_of_days_lyrics.pdfIn PDF document text
    • http://drive4mclaneaustell.com/59880356474vgk9a.pdfIn PDF document text
    • http://youtube-subscribes.com/xubalefozuluzp9j2f.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/7DCkv4d/mars_retrograde_2020_effects.pdfIn PDF document text
    • http://pl50off.info/mutixawasorenhqwnf.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/mavuwinelo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suvoxezol.rf.gd/countable_and_uncountable_nouns_worksheet_grade_3.pdfIn PDF document text
    • http://nejasixefunik.rf.gd/geographical_indications_act_1999.pdfIn PDF document text
    • http://fovelemuzawela.epizy.com/captain_underpants_theme_song_piano_sheet_music.pdfIn PDF document text
    • http://vijanemafe.rf.gd/nobanilatudenowunemor.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_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 5112 bytes
SHA-256: a858aae87639ed4e182eb4cc661ef2adf0426070d10057171c34f78dfaf252b3
font_01_sfnt_off000118c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C3 12180 bytes
SHA-256: 778d06a532462ae5ab9027ad811c03662344ccc9de0d6dda22915c28799a8e5a