Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ef26726974a12c…

MALICIOUS

PDF

72.9 KB Created: 2021-02-23 02:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56fc8a2bf1ace44b5b0e388abcc4242c SHA-1: ecfd94f689a7d6daec0721ecaf8325d81db0e9cb SHA-256: e6ef26726974a12c4ae95b80644ba7ca43016a11c57a5728e95fa41f114d4257
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution campaign.

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 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.
  • 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://maypoin.ru/aws?utm_term=senior+project+manager+jobs+seattle PDF link annotation
    • https://cdn.sqhk.co/jidelugob/d07EhaJ/royal_farms_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/giqjahb/mozokogibuzefotozumowo.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/4500460.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/gEjaoGa/11066708891.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/hihgii4/temunometiv.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/xbgj4kd/fake_gps_pokemon_go_ios_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/hbchaia/doodle_jump_unblocked.pdfIn PDF document text
    • http://gotedez.22web.org/android_java_convert_byte_array_to_string.pdfIn PDF document text
    • https://cdn.sqhk.co/sisowufabo/hcAgfsV/black_widow_movie_release_date.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/xoguwavosuje/pirirutitena.pdfIn PDF document text
    • http://newubopuga.epizy.com/vapan.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/49235866437.pdfIn PDF document text
    • http://gikasabedadex.rf.gd/kuxuni.pdfIn PDF document text
    • http://liboditi.rf.gd/preeclampsia_guidelines_2018_acog.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/audit_report_format_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/23741405300.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_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 5572 bytes
SHA-256: 0ac972af8fbc13d33c42dfa45fe11cb887805ec31de48ccc488c97875bf55790
font_01_sfnt_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 10652 bytes
SHA-256: b18d5fea590c705a8b78069099e1bf158776bac0960b36f504fe186f76c0321b

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