Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1933ea3a4939180…

MALICIOUS

PDF

75.8 KB Created: 2021-04-23 01:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f70a2afc2ec035e20cd270a4813c3378 SHA-1: ddf5fe9a2cef7f015e4913100ea5817eb61ba1a7 SHA-256: e1933ea3a4939180c6ce235cd49e57f7c2f4a550a52b81f2b3acd9b58886b833
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://dugedepap.ru/strik?utm_term=how+many+questions+can+you+miss+on+the+california+drivers+test PDF link annotation
    • https://zuwogirunuwexi.weebly.com/uploads/1/3/5/3/135331524/5457267.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/BONieXk/92859606325.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ixifjfN/farorewonu.pdfIn PDF document text
    • https://jatufabafalili.weebly.com/uploads/1/3/1/6/131637938/kubexeki_jabubuzuj.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/improving_self_confidence.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/EtLBjen/my_lg_android_won_t_turn_on.pdfIn PDF document text
    • http://zomuregunaradu.iblogger.org/xanufirufirorosofale.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/how_to_conduct_statistical_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddf6214-4717-453c-95b6-88676ffaa78d/razajuk.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/origin_dan_brown_movie_tom_hanks.pdfIn PDF document text
    • http://gunexukod.epizy.com/hyperbole_and_a_half_free.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/shahenshah_2019_bengali_movie_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e29d42e5-408c-4389-90e2-20ea5f948a5a/sonebogugikexunalopi.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/xinatokodilolavijenoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380a3a5c-096f-4b02-9db7-05d3d7f82485/craftsman_shop_vac_parts__accessories.pdfIn PDF document text
    • http://pefimubis.myartsonline.com/autobiography_of_a_tree_for_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784e9276-2ad4-4451-9403-8f389b060bf1/82858503723.pdfIn PDF document text
    • http://nolutujurevovi.epizy.com/how_to_use_simplicity_sewing_patterns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8bf2c6b-267a-4981-87ec-2abd7ff89212/nuvuj.pdfIn PDF document text
    • http://lekekavom.epizy.com/giganezezuxuta.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_off0000e916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 5600 bytes
SHA-256: bde23a758c329149bb8ee5d5d9839fb35c5d5eea867e8f9ce57f1311225f549e
font_01_sfnt_off0000fc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0C 10992 bytes
SHA-256: 734fc2ee22e010f672cb012bc484a5fc6ee1a1ab8991ced0f44135867e874999

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