Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b0cad19acc5cff…

MALICIOUS

PDF

80.1 KB Created: 2021-03-12 21:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0bd41aa0fa09a764096f4dab1746e809 SHA-1: 1f0dc590ba0b1ce1f80fffe1bbdaa99519405e42 SHA-256: b1b0cad19acc5cff73b44369cebd0591ae48c35c911699e31dbfe90f78593693
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9998

Heuristics 6

  • 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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/123?utm_term=neomed+absence+request+form PDF link annotation
    • https://cdn.sqhk.co/sutazojawote/6VhdZhe/livestream_tv_app.pdfIn PDF document text
    • https://cdn.sqhk.co/migukosodaza/Lbib3gi/flight_simulator_2020_vr_support.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/6hhjiHD/plumber_24_7_dublin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_0475058d0ab6497baa5c2f6c424efe4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/green_natural_background_wallpaper_free.pdfIn PDF document text
    • http://bawilifugoxak.epizy.com/vojujipajuko.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/watchman_nee_the_normal_christian_church_life.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/dbt_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/25393352287.pdfIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_a279a1e1992447c18b4c8d4961139456.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gozifep/sewafefadixafu.pdfIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_9e78f1f03a984ad892c98e792d64ed6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kumasala/velogufojivogapez.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_471bd645fba64cdfbb34337a9e3abd4a.pdf?index=trueIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_2f0210458e5a4bab97d6a3c5cc6a54a3.pdf?index=trueIn PDF document text
    • http://dujizadixupodur.epizy.com/dokojudadu.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/54484876150.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_f5944901256b4fd5b9f9bf80cfcf0418.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/22593174321.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_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 5368 bytes
SHA-256: 48498b694f74798d15fcce1d619fa6c993b2183f65c2597707d0dd4827970f5d
font_01_sfnt_off00010e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7E 10816 bytes
SHA-256: aa95406494b06451386806119bd7253287c6fbd8eab0417e9a0ded7e05538dce

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