Malicious PDF — malware analysis report

Static analysis result for SHA-256 0853647678307424…

MALICIOUS

PDF

82.1 KB Created: 2021-03-16 04:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 13b7d31f9922711748eb2270a4011ed9 SHA-1: bd02d0010fc8b9585c0fbd4302246b03dd3fddfa SHA-256: 085364767830742423e375b90e3d3c2d78e0c497c036c8c5533d1ad6fef478f8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://maypoin.ru/award?keyword=characteristics+of+entrepreneurial+behaviour+pdf, which is likely used to redirect users to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=characteristics+of+entrepreneurial+behaviour+pdf PDF link annotation
    • https://famipitep.weebly.com/uploads/1/3/4/3/134355151/redutexosoz.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/8Y7giHi/ice_cream_sandwich_youtube_gift_set.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/idkhhci/barbie_swimming_pool_racing_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/hiTeu4Z/barcode_scanner_in_android_github.pdfIn PDF document text
    • http://ribininewo.22web.org/how_to_take_apart_smart_trike_3_in_1.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/XCbxrih/megamind_movie_clips.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/yhcGhe3/13992961161.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/posojifaxulute.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/kgchhb7/reruwopej.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/hyfSifZ/47448404428.pdfIn PDF document text
    • https://cdn.sqhk.co/pewowutefiw/n6Kf1jk/belewaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_0d1b340cdc91478593f970044f901227.pdf?index=trueIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_55cd9293420e46d1b0af0816c022419f.pdf?index=trueIn PDF document text
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_0f6b19919dd84e288777ead607f1dbf0.pdf?index=trueIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_677c426933f2463289013250bbfbabad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pujirageg/accuracy_and_precision_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/heartache_meme_template.pdfIn PDF document text
    • http://kojaburu.epizy.com/bilingual_chinese_english_books.pdfIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_e6fd03d8f043476faf4d43201b9e4355.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/hvac_system_full_form.pdfIn PDF document text
    • http://katibabiziv.epizy.com/leboliligumaru.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_off000102c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 5348 bytes
SHA-256: 51ecf880186287fdc42c4495eb08d5594cc4fa47f21c21a17c137d64262ff514
font_01_sfnt_off000114e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E7 11028 bytes
SHA-256: b6a59e5cc7217432f5893ed19cfe53b5d291281dbd3003819d26ec52c690476a