Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e83aeb0c8b663b…

MALICIOUS

PDF

84.0 KB Created: 2021-03-11 01:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5d80be74d97d01e722758850a6c8c8c5 SHA-1: 279a924821e875bb233b71b5322a70a62c2a2d1f SHA-256: d3e83aeb0c8b663b004c9f5eaa3f286a652ab8263e86d238fb71e6ec68dffc19
134 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. One of the primary URIs, 'https://jottigo.ru/strik?utm_term=how+to+know+if+your+baby+has+developmental+delays', suggests a phishing lure related to developmental delays. Another URI, 'http://nageramuvepom.mywebcommunity.org/when_did_bc_and_ad_become_bce_and_ce.pdf', points to a link farm on disposable hosting, further indicating a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/strik?utm_term=how+to+know+if+your+baby+has+developmental+delays PDF link annotation
    • http://nageramuvepom.mywebcommunity.org/when_did_bc_and_ad_become_bce_and_ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489969/normal_5fe8045c6129c.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/etifqBQ/songs_like_hopeless_romantic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_5fef0104baaba.pdfIn PDF document text
    • http://wopuxefisov.iblogger.org/english_metric_conversion_worksheet_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_601394171bb81.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/djiglih/celebration_castle_ludowici_ga_31316.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/t0hjjdB/tixubepobevamepafesabidiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pepegizeso/fifjesN/32150628576.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/50140073454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407996/normal_5fd125784eca0.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/industrial_buying_behavior.pdfIn PDF document text
    • https://cdn.sqhk.co/dusawugivepo/dhj2JC0/easy_dessert_recipes_with_heavy_cream.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fcc0c9ddda8b.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/zalisujezajaje/where_is_the_learn_button_on_the_liftmaster_8500w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f078e2c5-25b1-4ad7-9b87-3d32119bf6e4/51894082296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f52ec0-057d-461b-86fd-06c91e0f876a/77731468956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bfb5626-8c58-42d6-8e55-c41c28cb213f/95989847615.pdfIn PDF document text
    • http://batogejupimole.rf.gd/paper_cutting_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722170e2-6904-451e-bda0-70a492ba8066/46779319358.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/algae_and_brine_shrimp_experiments_analysis_answers.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/31150952217.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/best_formations_fifa_20.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/pimakuvugel.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/arcsight_esm_upgrade_guide.pdfIn PDF document text
    • http://nejuzuwesikodik.rf.gd/alphabet_phonics_songs.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_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 5700 bytes
SHA-256: ee20df5dfbbb85be137aabcd6ff62c9d52a9bfcd3db9aec2401d7192f8efdda5
font_01_sfnt_off00011bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 10436 bytes
SHA-256: dfa1c7e9f7df29aeb2522732e2cbbc5edb02f58d0c8b26ec23721152b49bcac9