Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bcc3be2f39513d…

MALICIOUS

PDF

78.5 KB Created: 2021-05-24 13:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 99a4e6ab40d456104ead30ae3b28618d SHA-1: c8c6bc494f969757ed15bc1461899cd69f762618 SHA-256: 15bcc3be2f39513d7a6b5d80475be0f94d1188d38ad4785f905d925551de7bd5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning attempt. ClamAV and ML classifiers flagged the PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://jacksth.ru/strik?utm_term=the+maze+runner+summary+sparknotes PDF link annotation
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/koferumir.pdfIn PDF document text
    • https://komimuvupelogi.weebly.com/uploads/1/3/4/3/134312664/bitirivakawemid.pdfIn PDF document text
    • https://pazodozonevaken.weebly.com/uploads/1/3/4/6/134606284/xorejatinafu.pdfIn PDF document text
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/ravawar_zedonanesa.pdfIn PDF document text
    • https://rodetexozu.weebly.com/uploads/1/3/6/0/136096338/zekumatasowa.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/saronuvew.pdfIn PDF document text
    • https://veliwomi.weebly.com/uploads/1/3/5/3/135343105/sudusamikujob.pdfIn PDF document text
    • https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/218e58fffe.pdfIn PDF document text
    • https://darifojiwuz.weebly.com/uploads/1/3/4/5/134588766/b9d6e28a.pdfIn PDF document text
    • https://nilukosezaxed.weebly.com/uploads/1/3/0/8/130814529/37574001fcc9.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/sedimeraxufi/event_page_html_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/plato_timaeus_and_critias.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/data_structures_in_c_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/43340461508.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/ratuwovibepuwojolerab.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/dna_replication_worksheet_answers_chapter_17-_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/24906717223.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/ramopikesikoxedaxef.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/what_is_good_at_el_pollo_loco.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/astrophotography_tool_free.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/84984995512.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/bhagwan_ki_photo_ing_karna_hai.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/15965641330.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/zikilerinopubaw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 5192 bytes
SHA-256: 2c945c2533ef9535cc5f698a9ec61308f2370ff2f15c0005c79ae94abc19eaa1
font_01_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 11128 bytes
SHA-256: a5dcc33b425ca5f7e15ba71b3d6d739f6713dc6f0ab9490666e01d347880db03

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