Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ba53e8ea5de57c…

MALICIOUS

PDF

81.3 KB Created: 2021-03-25 09:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b60e975b9e29a123245e5a55a7a27055 SHA-1: 5e6f6466bcf65357c3f1d86503cfd16b3b444f3d SHA-256: 23ba53e8ea5de57ce13ae9f606da68d25b790dabab3b9f5792ac079d698f9f89
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 0.9994

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://zajinet.ru/strik?utm_term=shakespeare+sonnet+poetry+foundation PDF link annotation
    • http://rizaluvenore.iblogger.org/pampered_chef_double_burner_grill_pan_recipes.pdfIn PDF document text
    • http://rollernefritmassage.xyz/35929776150b14kj.pdfIn PDF document text
    • http://shtancircul.site/70288251439jhubj.pdfIn PDF document text
    • http://itali-big.space/47150206148ahi1x.pdfIn PDF document text
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/sabitete.pdfIn PDF document text
    • http://erogan-columbia.site/why_does_my_samsung_tablet_keep_turning_on_and_offzpkcj.pdfIn PDF document text
    • https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/7544815.pdfIn PDF document text
    • http://meinekarten.best/546023071pki4p.pdfIn PDF document text
    • https://pakupefo.weebly.com/uploads/1/3/0/7/130776676/voratak.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/mapa_mental_clasificacin_y_caractersticas_de_las_cuentas_de_balance_sena3805g.pdfIn PDF document text
    • http://fortuneo-enligne.com/72934900418ymns0.pdfIn PDF document text
    • https://muvebodexiju.weebly.com/uploads/1/3/5/3/135311879/b000ce.pdfIn PDF document text
    • http://thiswaytovogue.com/boxefukeqrwl8.pdfIn PDF document text
    • https://lupoxever.weebly.com/uploads/1/3/1/4/131413766/7408363.pdfIn PDF document text
    • http://sidesevofexow.22web.org/new_amsterdam_season_3_episode_guide.pdfIn PDF document text
    • http://letekidela.iblogger.org/kepejakidej.pdfIn PDF document text
    • http://beautysale.site/66166002789hhwbl.pdfIn PDF document text
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/3743101.pdfIn PDF document text
    • http://ceter.xyz/singer_fashion_mate_7256_bobbin_threadingif70a.pdfIn PDF document text
    • http://sexesex.site/2015_mazda_3_sedan_owners_manualogrg0.pdfIn PDF document text
    • http://qlemelest.online/what_stocks_to_invest_in_2021_canadafobv0.pdfIn PDF document text
    • https://pufoxedoj.weebly.com/uploads/1/3/4/4/134438994/dukosirixijisopik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowulibi.rf.gd/accu-chek_compact_plus_meter_manual.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_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 5364 bytes
SHA-256: a13552f3a3e38a489f501526ba718f04d2867c0530bf2c29944acd0ce46f2d96
font_01_sfnt_off00011120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 10836 bytes
SHA-256: 3039cbd0ae42cf7f2f65985e437b6e95375df7b42d5f710906c64a8168b4c5a6

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