Malicious PDF — malware analysis report

Static analysis result for SHA-256 973881d319c5d1f5…

MALICIOUS

PDF

68.8 KB Created: 2021-03-20 01:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c1e349048ebe150bdd874604c27fa400 SHA-1: fd400f482659da565122f8463de31dbe793a67f1 SHA-256: 973881d319c5d1f5d9fe585d4f79f59b157e589bdb11de4c057e0974c923c9cb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/wix?keyword=borderlands+2+the+cradle PDF link annotation
    • http://bomawowaziwan.iblogger.org/32584423972.pdfIn PDF document text
    • https://xolixofebus.weebly.com/uploads/1/3/4/5/134502144/semififo_sokewuwuzasib_ponazizegi_tapokewu.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/jagjJOm/wawobej.pdfIn PDF document text
    • http://jegewuzewan.iblogger.org/75704258141.pdfIn PDF document text
    • http://sisefotazu.22web.org/gugezapezejagega.pdfIn PDF document text
    • https://jobipidamefoji.weebly.com/uploads/1/3/4/6/134696246/pazofav_zelotol.pdfIn PDF document text
    • https://nibivesulekot.weebly.com/uploads/1/3/4/0/134017222/7482965.pdfIn PDF document text
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/96484.pdfIn PDF document text
    • https://kobuwejen.weebly.com/uploads/1/3/0/8/130873730/givasidel_pizuz_nuselenifusikot.pdfIn PDF document text
    • http://sunukekubuwaraj.22web.org/coleman_northstar_dual_fuel_lantern_manual.pdfIn PDF document text
    • http://janetoxanonim.22web.org/notarisemukewomedanirel.pdfIn PDF document text
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/korupifegapilozekav.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/bIq5qgj/sokiwoxakogajuvidakob.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/4EYjcSz/juzerapuzevinikezul.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/19af061d9b215c5.pdfIn PDF document text
    • https://zirowebepalijiw.weebly.com/uploads/1/3/3/9/133986526/206576.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/hgcjhij/52815287046.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74aa8589-04ca-49b2-a9c3-98b78f61dc0a/volowadujibodomem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71244aa5-ef68-407d-a3ea-3efa21a0a09f/where_is_the_speed_sensor_located.pdfIn PDF document text
    • http://sejabodareluf.epizy.com/iomega_ix2_firmware_update.pdfIn PDF document text
    • http://jozazesebogole.rf.gd/the_summer_i_turned_pretty_tv_series_cast.pdfIn PDF document text
    • http://jizuperuxe.epizy.com/zagakaxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc00ebd9-b4dc-4c2f-a47f-0b3c2fa25dff/royal_mail_international_postage_christmas.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_off0000d0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D7 5208 bytes
SHA-256: a4ce65005dc765144de54616850f486560a5a900768b8cbfb237fe7ccb45dea4
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 10312 bytes
SHA-256: ba869dfb3c4f19480a0f9195aa236e00db7c0613e0893179a877af75d4b7ec9c

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