Malicious PDF — malware analysis report

Static analysis result for SHA-256 246284d1336c9a45…

MALICIOUS

PDF

76.8 KB Created: 2021-04-08 01:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 071dfbc5bcf7d1e95ae8c5ebcc04f51f SHA-1: d943d0b59d54553c27ca1f6d7d4d5554bed803a9 SHA-256: 246284d1336c9a4549c6e28d9c35fd6c4cde4281a19703f6cbd0bf319baf2d00
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 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=last+child+in+the+woods+pdf+free PDF link annotation
    • http://wudebakafepi.mypressonline.com/cake_i_will_survive_tab.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/vukoxokakumijexijopobo.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/kufividorebivofonusami.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/ha6wghk/xorivuxebomiwidijarem.pdfIn PDF document text
    • http://busapibasin.mypressonline.com/limitations_of_bureaucratic_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/iOEjhhc/love_wallpaper_4k.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/tidoba.pdfIn PDF document text
    • http://pagixuzipalopa.iblogger.org/kofivafadab.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/statistical_inference_silvey.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/1bhOhiF/yellow_pages_application.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gavawekib.myartsonline.com/aday_retmen_hazrlk_kitab.pdfIn PDF document text
    • http://vutevesofu.rf.gd/causal_comparative_research_design.pdfIn PDF document text
    • http://pidodexogejax.myartsonline.com/o_albinismo.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/the_metabolism_plan_lyn_genet_free_download.pdfIn PDF document text
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_565f2b39167549dd8499a0d1167c8502.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_e35ae673111a43a6a6dec397e5eed500.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/92379235791.pdfIn PDF document text
    • http://konapawejiwevin.epizy.com/futagopun.pdfIn PDF document text
    • http://xulelaperimiku.epizy.com/10513192819.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/libros_apocrifos_enoc.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_off0000ee72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE72 5276 bytes
SHA-256: 60f1b6e847173ecf25584979924f6dbd63c7953bf2c5e7ec5bc439af5fbcfb1a
font_01_sfnt_off00010075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10075 11104 bytes
SHA-256: e4810e963d5a8a833be60b56f544cb54abda65e9c08a670702a52291fcf85b7a

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