Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf9aa0de937718f…

MALICIOUS

PDF

69.7 KB Created: 2021-04-06 12:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3548a6632632736a48955ab91e12d42b SHA-1: 00ef62714c1156eb413b23114b491faeeb4d6104 SHA-256: baf9aa0de937718fc8b102ecab90c9d4b984e283beb95327e32278606ab70c4f
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://resalured.ru/123?utm_term=video+anyone+of+us+meteor+garden', is directly embedded and points to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/123?utm_term=video+anyone+of+us+meteor+garden PDF link annotation
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/zudijusatokot.pdfIn PDF document text
    • http://copyrighthelpptteam.com/8968032777dqjzb.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/a4d5488e4855.pdfIn PDF document text
    • https://malavaxun.weebly.com/uploads/1/3/4/0/134018228/3337045.pdfIn PDF document text
    • https://xupunidumurewes.weebly.com/uploads/1/3/1/4/131437359/3fb4bfb395451a.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/online_annotation_tool.pdfIn PDF document text
    • http://salonhq.xyz/634950252867ltj6.pdfIn PDF document text
    • http://arfeshome.com/69413693261w6zkw.pdfIn PDF document text
    • http://obzorov.site/sputnik_sweetheart6mxfc.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/sivolagusimad.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/big_ideas_learning_algebra_1_answer_key.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/fezepadokasa_fipeb_mibegibibigawan.pdfIn PDF document text
    • https://weritudasokapo.weebly.com/uploads/1/3/4/4/134494226/vemereberujuzij.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/netinuwa/bser_ajmer_books.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/mastering_chemistry_chapter_3_answer_key_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/history_of_memory_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/why_iso_27001_certification_required.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/rusov.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/57243180459.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/2395436526.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/nitecore_d2_car_charger_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/new_bhojpuri_movie_video_song.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_off0000d2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A1 5264 bytes
SHA-256: ed6440d9cf1601c7deabefc7128debbf2884b184cb9e2651180446c712ab91a1
font_01_sfnt_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 10688 bytes
SHA-256: e0cdd228ebfd1f064fc0f0ab542220d3fc1891fa097fee41b2b3114d299e6b9b

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