Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcc4a024244c37e…

MALICIOUS

PDF

80.3 KB Created: 2021-03-21 09:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2f497fb598c1eb1e8a4b7749200edcb3 SHA-1: 59bcdb77744646176c8947167f2c093df4029ae0 SHA-256: 8dcc4a024244c37ef454678fdc47e64aa7fbd9af1f2151851d04a71c90fe2dc3
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a lure to malicious sites. The PDF structure and embedded content indicate it's designed to redirect users, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/award?keyword=alan+watts+out+of+your+mind+pdf+download PDF link annotation
    • http://woxijakuzadajew.getenjoyment.net/base_level_of_erosion.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/ic0Hxie/fanewuxabexugigemomute.pdfIn PDF document text
    • https://norabemomo.weebly.com/uploads/1/3/0/9/130969424/demovi.pdfIn PDF document text
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/ebaa5b5.pdfIn PDF document text
    • https://cdn.sqhk.co/tigafita/hfjegh4/83127807099.pdfIn PDF document text
    • https://kexufufebir.weebly.com/uploads/1/3/2/8/132814170/jobuzitewulobu-mekiro.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/xImqphj/67898192877.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/hfhdxjh/78984802352.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/8ijiagt/simple_website_templates_html_css.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/84702259411.pdfIn PDF document text
    • https://lobarogilipewu.weebly.com/uploads/1/3/4/4/134462863/1036959.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/constitucion_poltica_estados_unidos_mexicanos_1857.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/63981023260.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/d68787bfea.pdfIn PDF document text
    • http://vekogevev.22web.org/allianz_se_annual_report_2012.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jobuzabibapopo.epizy.com/tijinu.pdfIn PDF document text
    • http://perepidowowavam.epizy.com/does_red_bull_give_you_more_energy_than_monster.pdfIn PDF document text
    • http://kabofed.rf.gd/form_for_applying_british_passport.pdfIn PDF document text
    • http://vomifavub.epizy.com/77178555817.pdfIn PDF document text
    • http://nojimaduxonariz.rf.gd/silepejojevaferefexakezu.pdfIn PDF document text
    • http://tawexega.epizy.com/sazesatuzapan.pdfIn PDF document text
    • http://pimekawuxa.epizy.com/little_red_riding_hood_characters_fairy_tale.pdfIn PDF document text
    • http://xulaxun.rf.gd/bamorona.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_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 5372 bytes
SHA-256: 6a49db08848aab806cb7368e60afa0a5c37a8a115ac128c28bae369c69ad1d3f
font_01_sfnt_off00010e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 10852 bytes
SHA-256: 9789f590d75acb402ada2032f5bfc02a2c568ad6a28e3660caddfac62ad00a8d

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