Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4193e6c7f77a30…

MALICIOUS

PDF

74.7 KB Created: 2021-04-01 02:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9a363e4ec663f5c2ab138d57d2d7f865 SHA-1: 574c4ca2658c4ee6ab4f7d140ad0b6f8edb62c54 SHA-256: 7b4193e6c7f77a30226a121b1bbac03f82f16d76c62d224608f468011c9be3cc
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-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://dugedepap.ru/strik?utm_term=what+is+computer+network+in+ict PDF link annotation
    • https://cdn.sqhk.co/jogekiluse/PCcigas/nature_sounds_rain_summer.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/bhdfibn/wamuvofoxipojekapegerin.pdfIn PDF document text
    • https://motedozanegiraz.weebly.com/uploads/1/3/1/3/131383309/lozasenod.pdfIn PDF document text
    • https://texodixoxi.weebly.com/uploads/1/3/1/8/131857215/wagaxufidali_konadelol.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/3510853.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/ijhiQjb/rtc_mobile_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/iNDst7V/keyboard_keys_change_suddenly_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/ghdsmLY/electric_heater_energy_cost_calculator.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/79575.pdfIn PDF document text
    • https://bodumiwi.weebly.com/uploads/1/3/1/4/131406735/3218255.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/iMhhhbx/31556284095.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/jc2kRgd/lenovo_chromebook_c340-_11_charger.pdfIn PDF document text
    • https://nedijevir.weebly.com/uploads/1/3/1/4/131406348/7274393.pdfIn PDF document text
    • https://lekofubazag.weebly.com/uploads/1/3/1/8/131872104/wowiporedizadus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetevali/zofusodokawudo.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/where_can_i_download_fender_fuse.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/reviru.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/povegomeluxari.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/guzuxafa.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/malayala_manorama_malayalam_news_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/b_l_theraja_basic_electronics.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 5308 bytes
SHA-256: c28ddf0d62c23a1ab2847bc7f52e0466ab0fa8a2fa076769c2230e314d23900f
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 10048 bytes
SHA-256: 1d3de93e7b1f79c59961ef633b152972801c509d957fb0efc8421794e5a85dfa

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