Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bdabcd7dc3a74a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-02 22:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1b1bf5340a3d0252cbd032423a50fc36 SHA-1: b73250af0091a6f8213278d558398639b25ef9ef SHA-256: e4bdabcd7dc3a74a41adfec572d9a76c3f745ccd12a2d3446bbf8dd0af4b931d
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/123?utm_term=biochemistry+books+for+beginners+pdf PDF link annotation
    • http://jedilinosur.mywebcommunity.org/65554365044.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/scouts_canada_cub_scout_uniform_insignia_placement.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/how_to_connect_backbeat_fit_to_computer.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/is_the_gloss_in_the_irish_times_today.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/xewuji.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/wopigimidira.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/how_to_use_samsung_dishwasher_dw80r2031us.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/suxuzubojut/limesurvey_survey_templates.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/tuesday_night_spots_atlanta.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/explain_the_characteristics_of_good_research_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/assignment_format_latex.pdfIn PDF document text
    • http://jokosen.atwebpages.com/fundamentals_of_english_grammar_5th_edition.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/26321161620.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/octavia_butler_wild_seed.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/bezidifonajuwowobito.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_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 5472 bytes
SHA-256: defb51eb6854dc478f874a5572396680f9afef7a7fb55675abe30b46ba82bbf2
font_01_sfnt_off0000f15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15F 10552 bytes
SHA-256: b23e2a0f6c723db06e5af8498d9a0c287ad6141296a476f4095e57039f757870
font_02_sfnt_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.