Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f4b7795af4b0eb…

MALICIOUS

PDF

80.4 KB Created: 2021-03-08 06:12:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0794485f8244d0ad8278a669db114ed4 SHA-1: d1e39460b543ad7bb35ebaa9c1d559a38092ee43 SHA-256: 01f4b7795af4b0eb2813ceeff9b2322a31771ae13314964b72e30861631f735b
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 0.9990

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://maypoin.ru/strik?utm_term=tabela+fipe+carros+usados+ford+new+fiesta PDF link annotation
    • http://imm-shoes2.club/appium_scroll_down_android_ruby4rvps.pdfIn PDF document text
    • http://storeyou.store/42103924965n4wl7.pdfIn PDF document text
    • http://hookup154.fun/faux_leather_sheets_halloween9lxh5.pdfIn PDF document text
    • http://wirelessinfo.ru/black_diamond_spot_headlamp_user_manual74aft.pdfIn PDF document text
    • http://gallery-shop.site/kuiu_guide_jacket_for_sale1po6y.pdfIn PDF document text
    • http://mxbur.fun/kindle_for_pc_bookwtpl3.pdfIn PDF document text
    • http://czecheducation.space/778565247148r8t2.pdfIn PDF document text
    • http://guzuguse.22web.org/83691925994.pdfIn PDF document text
    • http://gosejoligezo.iblogger.org/suzonivukelawuba.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/baptised_in_the_holy_spirit_and_fire.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/how_to_eat_calories_deficit.pdfIn PDF document text
    • http://tehnotop.site/mejulevifetespyv8.pdfIn PDF document text
    • http://shortsomfj.space/75207762198zriml.pdfIn PDF document text
    • http://mexuloxuxinona.iblogger.org/graphic_adventure_games_android.pdfIn PDF document text
    • http://poradoit2.site/38841877944e5f0x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_54ca9ffd150f4960aea776972f7eeb8b.pdf?index=trueIn PDF document text
    • http://tufuripisaren.epizy.com/fishing_guides_in_everglades_city.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_fbb18493bb29400ab52402628f822e2e.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_5b53abae45874181bb806069d6992c7c.pdf?index=trueIn PDF document text
    • http://nesazovopiw.rf.gd/where_to_watch_missing_411_movie.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/humminbird_piranhamax_197c_di_fishfinder.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_d36d1b6fd0d840069b6041d30c13c8d5.pdf?index=trueIn PDF document text
    • https://d9c73feb-c945-4d97-9d44-ff62a4b57c47.filesusr.com/ugd/12056e_692c6de7eb804bc98ef6acc3161920d9.pdf?index=trueIn PDF document text
    • http://luregaw.onlinewebshop.net/53773925613.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 5212 bytes
SHA-256: 477a4ddcff491984ede62170d2498182e8fce39547dba3dcac8cdbd7f4ab9c46
font_01_sfnt_off0000fff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 11424 bytes
SHA-256: a07dbdaaf91f9f87353d7cfcde513c6f00fe9ebdf46a8b4560c101e85ea58211
font_02_sfnt_off000125b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f