Malicious PDF — malware analysis report

Static analysis result for SHA-256 947a2090947c34d5…

MALICIOUS

PDF

69.6 KB Created: 2021-03-17 22:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 30fba7bd1c4273d99678ea9052c5b938 SHA-1: 6f526adc28f808d3a76321e492080ff12a72e411 SHA-256: 947a2090947c34d5ab2618f18da67158848348fd8a0cfca5ee865b6d90c51052
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The primary malicious URL identified is resalured.ru, which is likely used to redirect users to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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/wix?keyword=i+hear+america+singing+close+reader+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407998/normal_603bde6522931.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/dVd4htI/best_teacher_gradebook_and_planner.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/hg0Sjah/lily_story_dress_up_game.pdfIn PDF document text
    • http://ductsunlimitedins.com/xp_series_gaming_chair_power_cordj4iz0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_603bac87b2108.pdfIn PDF document text
    • http://vinograd.io/41039042346erky3.pdfIn PDF document text
    • http://erkutungotu.com/zombie_kush_ripper_seeds_seedfindert7evk.pdfIn PDF document text
    • https://cdn.sqhk.co/sizebadit/Chex1P9/esl_play_clash_of_clans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479436/normal_60242bf056439.pdfIn PDF document text
    • http://uplrezina.site/data_analysis_techniques_psychology1yadz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_604fc656b47b9.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/wymhjje/index_of_movies_now_you_see_me_2013.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/penefelomiju/specification_template_for_website_design.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/65007582480.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/oxford_english_grammar_book_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/lightroom_apk_mod_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/angular_ng-_template_ngtemplateoutlet.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/import_html_bookmarks_into_chrome_android.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_a63ebe4f00564da987ee4c4d850d7334.pdf?index=trueIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_7790dd809cb14df8bf26ebc3965df254.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/free_vector_background_eps_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/adobe_acrobat_word_count.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_off0000d149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD149 5384 bytes
SHA-256: 822daa769836801066e76d786552a945fb30da4f4ff34a3901a4015939c5891b
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 10764 bytes
SHA-256: 08dbf8e5fa0552132c48bbfa8a1ef7e7504333287880bc62c2ecf657982b70a8

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