Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a27e445a32e667b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 22:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c3608765fb26796c52def561cfccc4ff SHA-1: 51ae681eef0ee5d50bcef1482415c1b1adac1970 SHA-256: 0a27e445a32e667bdb75c736be027f314e73ddf7071e01930d41417d5c9b37fa
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics further supports this attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://vilenefex.ru/strik?utm_term=hp+probook+6550b+i3+specs PDF link annotation
    • http://kojazunupetip.mygamesonline.org/40254738100.pdfIn PDF document text
    • https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/1329126.pdfIn PDF document text
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/4167514.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/ijgaaif/20441321221.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/physical_science_grade_10_study_guide_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/bdZjfhh/ragp_nigeria_login.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/17307585833.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/118052f511055.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/togufedediwa.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/jkvRTgQ/vovujakumiw.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/7ifkjik/rimivaviwugu.pdfIn PDF document text
    • https://cdn.sqhk.co/dojarodawiw/jdYYdPp/wewugexolejiwipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikunipif.epizy.com/serasonosaxalobupalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f46b0e-a1b3-40fd-be61-870a191d30d9/victorious_woman_warrior_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e374ec27-bdf7-48d7-852f-5b2ef42a3477/nato_phonetic_alphabet_to_english_translation.pdfIn PDF document text
    • http://xarififipevi.epizy.com/value_education_model_question_paper_for_class_6.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_7c20a8e5ff2e456ca17af03956e9a9b5.pdf?index=trueIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_254a83b90b2c44308d985d71a693e3da.pdf?index=trueIn PDF document text
    • http://xulelaperimiku.epizy.com/mitifu.pdfIn PDF document text
    • http://zibuxaladovokex.epizy.com/tableau_product_key_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1a7339-c730-43e2-baa8-afbe73801f2c/rowenta_dw23_access_steam_iron_reviews.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_881bac24ceb7453fb4ee360d16d90dd7.pdf?index=trueIn PDF document text
    • http://vugejepu.epizy.com/tallinn_estonia_tourist_information_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb57c300-961e-4d6c-8f6e-a0849ccb2fd9/marinajilu.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_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 5436 bytes
SHA-256: 4e35d2ab2518d196cc4887754f8e43e4b9574f0eff1638182c9d1eb468b64c91
font_01_sfnt_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 11960 bytes
SHA-256: 17fe1b3cd09f64f619d60b8fc3786663481aa50d0a0a2725de6dadab3322d3f6