Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cb19bc5a4a9384…

MALICIOUS

PDF

84.4 KB Created: 2021-03-23 01:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a2cdae1575fc9eed9dd6422937726b43 SHA-1: d3000c90249fd25c61847177d411f0415bd929ae SHA-256: 00cb19bc5a4a93841b5cbca040e7059cbb700fa387346b7548e38eaf88e469ea
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates tracking or phishing-related activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=anonymous+vpn++for+android PDF link annotation
    • https://cdn.sqhk.co/sitosuduf/wIhhXjh/61377849352.pdfIn PDF document text
    • http://irbestate.ru/how_much_is_a_zoomer_kittyok2hm.pdfIn PDF document text
    • http://nonretloli.site/acrobat_pro_dc_subscriptionf4lex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_603c31b6184e1.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/jbid3hg/italian_restaurants_condado_puerto_rico.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/ggjcLhT/blacksmith_courses_near_me.pdfIn PDF document text
    • http://usblighter24.site/how_to_change_the_battery_in_a_kindle_fire_hd_10n14ct.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/ghCgjia/14364327240.pdfIn PDF document text
    • http://twirlini.com/fallout_4_covenant_safe_test_answersd7kwb.pdfIn PDF document text
    • http://vehicleusains.com/491093545stlzu.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/s7Ajf9I/tomb_raider_movie_2018_soundtrack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_60148beb12a0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_601122ee4128b.pdfIn PDF document text
    • http://obmenkalnr.online/2315652463c059y.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/hehb8tl/call_of_duty_warzone_xbox_one_controller_settings.pdfIn PDF document text
    • http://biomanua.website/28352591052rfbw4.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/mtggjjj/funny_bad_valentines_day_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/ggghihf/headhunters_io_unlimited_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuzimew.rf.gd/rozepala.pdfIn PDF document text
    • http://lepejifilafimif.rf.gd/misaxuralotobafe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 5304 bytes
SHA-256: 1e744e436b9bbb03978b73d32375d130d84cd1e1ae71796e6bc111f94935e318
font_01_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 11200 bytes
SHA-256: 2804b5c244568fc154851bd6ee136a870cd8e18d870520ac8138c2804ca0ff2e
font_02_sfnt_off00012de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 16468 bytes
SHA-256: 1045d4f2d0039f7437e6ff6fa8358f2baf8422ee8b751cc30034a0c4a4da4026

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