Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b64211b13c33d3d…

MALICIOUS

PDF

111.0 KB Created: 2021-02-27 17:19:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6fcb240b7ad8e54eb06876983fe953d SHA-1: b048fce19965255c0fc23b7fac2571fbcc357e12 SHA-256: 5b64211b13c33d3d475d06ebe222e112ac58cbc0abf8ab80f4eb5ffd1036d0e6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://lozipotod.ru/123?utm_term=sims+3+expansion+packs+object+list PDF link annotation
    • http://jabilevij.mypressonline.com/oldways_mediterranean_diet_brochure.pdfIn PDF document text
    • https://jivezevovofefav.weebly.com/uploads/1/3/4/8/134896957/xemewi_viwida_xerasog.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/5uhcijD/soccer_world_cup_2014_brazil_vs_germany.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/best_oral_b_electric_toothbrush_uk_2020.pdfIn PDF document text
    • http://goodnatural.space/6396135025445van.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/91021894426.pdfIn PDF document text
    • https://refaxoke.weebly.com/uploads/1/3/4/6/134602084/7466880.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/3787481.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/what_is_pilot_arc_on_a_plasma_cutter.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/modern_chemistry_chapter_8_review_answers.pdfIn PDF document text
    • http://reduslim-italy.site/sunopenotiwaseme4fa69.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/inland_letter_of_credit_format_india.pdfIn PDF document text
    • https://ganuzuvotaju.weebly.com/uploads/1/3/5/3/135304652/gatuvata.pdfIn PDF document text
    • http://rating-bookmaker.ru/bibiruperagup8xruq.pdfIn PDF document text
    • https://xixebume.weebly.com/uploads/1/3/0/9/130969831/adba9.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/what_is_coding_in_software_engineering.pdfIn PDF document text
    • http://igoscandinavia.com/kung_fu_panda_3_link7jx8j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/python_programming_book_in_hindi.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/xofuriluzobuvu.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/what_are_the_features_of_organisational_culture.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_off00017177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17177 5596 bytes
SHA-256: 033c870f887d666dddfb884504802184af4a4cfa86f580b80c21da3fbb0fc060
font_01_sfnt_off00018476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18476 12060 bytes
SHA-256: 07815af0fb56296d115d5f5cd04ea1395eb43d0ab559380708f7e04f646078ce

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