Malicious PDF — malware analysis report

Static analysis result for SHA-256 12785be6d3b62013…

MALICIOUS

PDF

90.0 KB Created: 2021-04-03 17:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c98ebaf2741d38df447cb697f3d523c0 SHA-1: 513bb02c532e1da803b25390be5db3088c79b73a SHA-256: 12785be6d3b62013061b7057803666dfb827b34142cb47002ba267606542d63d
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 0.9988

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://botokaw.ru/wix?keyword=koopa+revenge+2+all+power+ups PDF link annotation
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/ribuniwifuze.pdfIn PDF document text
    • http://wavepolabipal.22web.org/news_in_malayalam_live_reporter_tv.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/bible_quiz_kjv.pdfIn PDF document text
    • http://ejqy.com/fuzuvuwaxiwanoxiponesasu01lw.pdfIn PDF document text
    • http://yoptan.space/sketchup_make_component_shortcutq7nh0.pdfIn PDF document text
    • http://price-list.moscow/the_ecology_of_the_planted_aquariumpnun5.pdfIn PDF document text
    • http://vijufik.iblogger.org/xozopefiferani.pdfIn PDF document text
    • https://nagilozumovamag.weebly.com/uploads/1/3/4/3/134317868/30b0ec7b3a.pdfIn PDF document text
    • http://dozedibigo.22web.org/37352662420.pdfIn PDF document text
    • http://habirovradik.ru/toro_518_ze_snowblower_spark_plugp2mtp.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/fapawaloxemu_xuwatifiko_kezudatarawapes.pdfIn PDF document text
    • https://genopajixon.weebly.com/uploads/1/3/1/4/131452954/kilowilijuxenonugene.pdfIn PDF document text
    • https://givebuzuwipagin.weebly.com/uploads/1/3/0/7/130775776/zegivikadunepikolug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidizovebimike.epizy.com/94533031900.pdfIn PDF document text
    • http://beritoka.rf.gd/belastingaangifte_2018_belgie_formulier.pdfIn PDF document text
    • http://zinofamokolete.rf.gd/zejaguzikepabuperu.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/finazuloxabovanolumer.pdfIn PDF document text
    • http://wafitiw.epizy.com/13907081242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d052ff49-9ae0-49b8-893a-f6e48da6f60f/vumasux.pdfIn PDF document text
    • http://vevurikadi.epizy.com/autocad_insert_border.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/nhs_complaint_acknowledgement_letter_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2715dfc4-64f6-4ca9-ac2f-fa40f831824d/how_to_setup_sandisk_wireless_flash_drive.pdfIn PDF document text
    • http://jedovimesize.epizy.com/suunto_ambit_2s_watch_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76431dc7-a66b-44e7-a11f-4c232b3dad3f/how_to_import_a_keynote_into_imovie.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_off00010d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D82 5240 bytes
SHA-256: deb76e79aaeacedb1a38e94758b61411b11919f6b09c98dcd5851026842f9cd6
font_01_sfnt_off00011f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F84 10876 bytes
SHA-256: 690d70c57a67f3445586e34b940121fa9e72fc2bd6e03089fe012b67190427d4
font_02_sfnt_off00014503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14503 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd