Malicious PDF — malware analysis report

Static analysis result for SHA-256 06474143ee2780ba…

MALICIOUS

PDF

100.5 KB Created: 2021-03-21 00:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 480af730d4f0cbbba11fadeb682332b0 SHA-1: d20b77f1966f858de5844f3c9919b8c7eb04d783 SHA-256: 06474143ee2780ba10ad26f99d48642a0e8cbcfef426dc6a6d911ff4a3d2ae15
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a malicious intent to distribute further content or manipulate search engine results. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external links and the detection signatures point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/8302738.pdf In PDF document text
    • https://cdn.sqhk.co/rokajoten/Jha1YTc/7571053755.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/gcgIrs4/28661306099.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/idpaian/walls_big_slice_ice_cream_price.pdfIn PDF document text
    • http://ravapusevuj.iblogger.org/tafsiira_afaan_oromoo.pdfIn PDF document text
    • http://sazefakopek.iblogger.org/definition_of_education_by_different_philosophers.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/218528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dN4lCoxrs6M/wb?keyword=ley%204/2017%20canarias%20boe%20consolidadoPDF link annotation
    • https://s3.amazonaws.com/falejogajir/ponun.pdfIn PDF document text
    • http://jumebesatupa.epizy.com/buyer_persona_template.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/vitamin_ampoule_mask_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/rezomep.pdfIn PDF document text
    • http://wegarasuw.epizy.com/lopomuwazizi.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/59968164487.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/do_judgements_appear_on_your_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/ge_xl44_igniter_wb2x9154.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_off000149ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AE 5648 bytes
SHA-256: 1c6085ee88ff72191362e3ce2b950159ae61763d2f43a469acfaa4a94065ca34
font_01_sfnt_off00015d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D13 11888 bytes
SHA-256: 7fb33e37af78b60e74bea177e0c5acf07c459638c3cd1e6f01aa64f5821e4f99

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