Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e0fdecd91a3b48…

MALICIOUS

PDF

73.2 KB Created: 2021-04-06 05:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 868540bfdec9452badf00f34ff311120 SHA-1: c0d219e3ff6a838e02f5cb17883efd3b241ac150 SHA-256: 19e0fdecd91a3b48bf9466f78949b76d4e45a044b44d18699799915e5e874277
186 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. 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 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://maypoin.ru/award?keyword=performance+appraisal+pdf+form PDF link annotation
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/2803d50075ac1.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/jbckjaA/50888383350.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/mrhajhd/87486638308.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/mu4igig/funny_ringtones_download_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tekunipifob/ij6gjhj/nursing_home_manager_salary.pdfIn PDF document text
    • http://mizifasurogik.mywebcommunity.org/belgian_malinois_training_guide.pdfIn PDF document text
    • https://zomedavox.weebly.com/uploads/1/3/4/3/134392748/fuliwajegubolalup.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/ZrC66Ta/hocus_pocus_t_shirt_target.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/jjcjdib/oster_pro_500_blender_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/zJDgiKK/41585932563.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/hZ3ageR/wutujuwawuzavugijedo.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/ifmXUmq/disney_plus_login_issues_vpn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_e842eac7b5204bd291405ee4c7e1b04a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/a_grief_observed_free.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_063adee45e45476e97f696e0a997c4fa.pdf?index=trueIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/thank_you_maam_short_story_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/how_to_solve_scale_drawing_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/58642878250.pdfIn PDF document text
    • http://vowojuxibaxo.myartsonline.com/zutoxoxabagutezipisa.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/what_is_another_word_for_progression.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/despicable_me_3_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_off0000e300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 5300 bytes
SHA-256: 9fcb78229ff773febfbc7a5fba37c91f3531674697c0a8299a815dea6aa5d631
font_01_sfnt_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 10172 bytes
SHA-256: 6e072b63a59e2b239a87f60adc3e0ea98a332ac418d04e20809e4ba537c84496

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