Malicious PDF — malware analysis report

Static analysis result for SHA-256 316f232bbe2d694c…

MALICIOUS

PDF

89.0 KB Created: 2021-03-14 12:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 52f353e12ce267baed3ee888d5a4d6d5 SHA-1: 941465d0b8560fb4b8239c9b12c16807ac97cb0c SHA-256: 316f232bbe2d694ccdca688d274b683d522f4bfa6588fd5127a48621d13690ae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://seumenha.ru/123?utm_term=organisme+de+formation+agr%25C3%25A9%25C3%25A9 PDF link annotation
    • http://myfirstsite.xyz/autodesk_3ds_max_2014_keygenhml32.pdfIn PDF document text
    • https://cdn.sqhk.co/zezugiwetibe/jjhaiho/6409406203.pdfIn PDF document text
    • http://flebolog24.com/how_to_take_moca_testvklcr.pdfIn PDF document text
    • http://bazis-rostov.com/70944894577gi73r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413850/normal_6000e4a2a2acc.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/nemobujojet-jaworafelavip-gupijaresumib-lisoxevinokiw.pdfIn PDF document text
    • https://zodoxofavuzawa.weebly.com/uploads/1/3/1/4/131437464/8217478.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426066/normal_60057dd99c57e.pdfIn PDF document text
    • http://portkamesto.site/in_formato_analogico_in_inglese8jx1n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_604927e83b825.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/fpdnLid/skulduggery_pleasant_wikipedia.pdfIn PDF document text
    • http://fullcreditreport.info/global_carbon_project_report_2017o8ffr.pdfIn PDF document text
    • http://haifaiv.ru/games_to_play_in_class_when_bored_on_computerh0t57.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/NIgiKPU/zombie_diaries_2_full_movie_free.pdfIn PDF document text
    • http://defi-bet.world/94284687467s01m3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5fe0655709359.pdfIn PDF document text
    • http://petrol-v-pol-price.site/tromm_oe_errornrt44.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://s3.amazonaws.com/nitajosasa/extent_report_selenium_webdriver_using_testng.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/the_hollywood_reporter_game_of_thrones_podcast.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_off00010d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1C 5152 bytes
SHA-256: 0927cdb67acfcde138ac7a567f3acc6627b5f7fc5cc417b27ded16c7aa85eb02
font_01_sfnt_off00011e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E41 12964 bytes
SHA-256: 2837fe04d6ed72e830ba56c4309ec56d7353952a5d6b6ceefc65df6263ac3440
font_02_sfnt_off000146d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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