Malicious PDF — malware analysis report

Static analysis result for SHA-256 818153d5bcf7e34d…

MALICIOUS

PDF

70.2 KB Created: 2021-03-28 09:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7579ed4003f5435faf4401d43610c5bb SHA-1: a5db5618d3bfd4c749298d7d1bcad6a6db921b99 SHA-256: 818153d5bcf7e34d20de6764ec6cf8e10f69b8f2e61720e8b5ff7c256ab2edb8
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://kuzutuzo.ru/123?utm_term=large+butterfly+printable+template PDF link annotation
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/jusijovuvo.pdfIn PDF document text
    • http://emmetrix.net/wuxigawijakurulutuvizogmq503.pdfIn PDF document text
    • http://fitdieta.com/nordic_theory_of_everythingvnoqz.pdfIn PDF document text
    • https://latoratepowubum.weebly.com/uploads/1/3/4/7/134713938/5f18be8e62c97b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5fdaca4255a55.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/mih4Vhh/e_bike_rental.pdfIn PDF document text
    • http://card2card.live/how_to_describe_climate_weather_differentbpwjb.pdfIn PDF document text
    • http://tdsevsvet.ru/fokedajojonixufelow7zej6.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/dKphhje/40986881337.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_602ce5e92ce89.pdfIn PDF document text
    • http://health2health.online/318658193223sy44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_60546462046e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_60517eec4f09b.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/mo1jiig/hamster_rescue_illinois.pdfIn PDF document text
    • http://re-capital.ru/how_do_u_share_a_video_from_facebook_to_whatsappl9o4k.pdfIn PDF document text
    • http://buyfastedcircle.xyz/vuloxazepotibafedokjfvt.pdfIn PDF document text
    • http://shop-you.xyz/samsung_galaxy_tab_4_7.0_release_dateo4j8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_604a350b39a4b.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/jhUDheR/music_player_for_pc_with_equalizer_free_download.pdfIn PDF document text
    • http://afterdealer.pro/ronewevujuxesovnnd20.pdfIn PDF document text
    • https://ralaxegivasud.weebly.com/uploads/1/3/0/8/130813417/7919326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_605fa0bdc3291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_6023fe6421a43.pdfIn PDF document text
    • https://cdn.sqhk.co/tojuxuzumar/bQEgehd/car_game_karo_please.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_5fee3d6f6a7bb.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/tajitog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 5224 bytes
SHA-256: e0b2626694c4f3a47b60999604e94fc2ea77e672c9c8f347ccbe61043ddab97a
font_01_sfnt_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 10168 bytes
SHA-256: a0e7aadff307711ad1f2be84119f95eaa2e8d10128d9f936a842ff5831d03b60

Open this report in the interactive analyzer, or submit your own file for analysis.