Malicious PDF — malware analysis report

Static analysis result for SHA-256 901bbe43a4cc5100…

MALICIOUS

PDF

78.6 KB Created: 2021-03-30 22:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d06305ace343bcf5a4e2feb4e5378107 SHA-1: 93d07a299b86d837c20a786f7f72fa3c5539839f SHA-256: 901bbe43a4cc5100c647c3dd4777f0325579ba0e84a081e063accd4c7ffa8e1a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs, 'https://kuzutuzo.ru/wix?keyword=dallas+elementary+school+dallas+pa', is likely part of this malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=dallas+elementary+school+dallas+pa PDF link annotation
    • https://dafuzimobolu.weebly.com/uploads/1/3/4/4/134498283/2904999.pdfIn PDF document text
    • https://dunijolojuk.weebly.com/uploads/1/3/1/4/131437931/50f91abb00.pdfIn PDF document text
    • http://biwumani.mywebcommunity.org/how_to_edit_a_file_in_adobe_for_free.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/ab369918d624e.pdfIn PDF document text
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/rokamumawe-siteke-reguwof-dudajadefipe.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/sda_pathfinder_classes_colours.pdfIn PDF document text
    • https://zatibuvox.weebly.com/uploads/1/3/0/7/130738619/6788767.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/vosofezebefasijaxedi.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/a_question_of_power_bessie_head.pdfIn PDF document text
    • http://vowewudimo.mypressonline.com/mathematics_optional_syllabus_for_upsc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kosipefojaw/12812367168.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/ultrasound_guided_costoclavicular_block.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c83b5ab-f521-489f-9a95-cbec13027714/feminist_theory_definition_social_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a98b0a-6e88-496f-b00d-758dc4c3ff66/adding_and_subtracting_integers_word_problems_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af38da6-dcdd-48ba-8005-5bbd0e0937fa/puparomuxodi.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/wallpapers_hd_free_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/where_is_truist_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bfce1f-fbec-4e8e-a977-01067eb2b281/verb_preposition_collocations_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/ford_3000_diesel_tractor_starter_wiring_diagram.pdfIn PDF document text
    • http://nubirumoxid.onlinewebshop.net/ielts_essay_brainstorming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26ec3c0-d510-42ca-ba25-b20f10cd7adb/xagevemonamamosilofab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE690 5152 bytes
SHA-256: e80d2bc964bb504bd0968399f5e8109d2c5c7184f0c299cdd090f10868a9879f
font_01_sfnt_off0000f7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EB 11412 bytes
SHA-256: 7d86d61df837ec47f1ec456c99c3269629290eb2babe7329f07cc44a2ed0cdf5
font_02_sfnt_off00011ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.