Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7bb7239ed499d0…

MALICIOUS

PDF

79.9 KB Created: 2021-03-09 06:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 896e530d69dbd08ff0c7e8dea25a4d05 SHA-1: 4871fdca3d810ea135a419751584701c7c1f039a SHA-256: 1a7bb7239ed499d017bc779e0deb0767c824659cf97593dab1ae9c1410ee3f41
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The embedded URL `https://jumiwimov.ru/wb?keyword=war%20and%20peace%20actors%20bbc%202016` indicates a lure to a specific search query. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan, supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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://jumiwimov.ru/wb?keyword=war%20and%20peace%20actors%20bbc%202016 PDF link annotation
    • http://nibewubixela.getenjoyment.net/fundamentals_of_applied_dynamics_williams.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/jiieo32/man_down_under_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/iaicjfq/wobewomiwijowegosi.pdfIn PDF document text
    • http://dinewegivogofe.mygamesonline.org/how_to_adjust_g_shock_5081_ga-100.pdfIn PDF document text
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/bafopum.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/iso_9001_quality_management_system_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/iPGYieG/93103323671.pdfIn PDF document text
    • https://keninowe.weebly.com/uploads/1/3/4/6/134617270/6628087.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/petition_for_grant_of_letters_of_administration_pa.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/15dd00ff30d226.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/lilafutog.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/65OnOgh/vapule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/wigabufu.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/luxomekaxasusuwuzizile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b51e9519-6cdf-4930-809d-89f7cfa7024f/buwozezuwakebasebiba.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/hp_photosmart_c4585_print_cartridge_missing_or_not_detected.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ff686a-6146-4788-be5b-64edadca9b7f/2174240255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ffe9a2-8017-4f39-afb2-a10242dd4dcd/xisoxajuxemezuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0862ea5e-73b5-41d3-b212-58cf00b48a63/4152338276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0eedf8-8202-4799-8f81-d6dc892f96fe/moferaxevir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944b7e6d-bbc3-4454-8102-8fca139f0b20/how_to_connect_my_fintie_keyboard_to_my_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749933cc-a736-44de-96b1-c572cd492567/43980427800.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/90575244412.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/nivopekenob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01be7c17-f024-4b09-958c-7a3a72ce3445/cub_cadet_lt1050_ignition_switch.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 5408 bytes
SHA-256: 9072929b2272744b4dc1e45280d995f7a99bc04db5745944495e2c034486ef64
font_01_sfnt_off000100d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D1 10336 bytes
SHA-256: 11de29af9b887efbdfba12709b3fe5f586a484e513a95ecb011b4decf68467a4
font_02_sfnt_off000123f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F0 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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