Malicious PDF — malware analysis report

Static analysis result for SHA-256 4872733094e40bfc…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 11:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0322e4abb9caae6b836cc0fba70e06a SHA-1: b812d72ec583e9762edc8a5317f4ac5f57b78409 SHA-256: 4872733094e40bfc337db8b2b9fcc690f98402dfd9183a8e2e3cb4416f59446d
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://jumiwimov.ru/wix?keyword=net+ionic+equation+answers', is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Net ionic equation answers', likely to trick users into visiting the malicious URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=net+ionic+equation+answers
    • https://cdn.sqhk.co/rubogomuweme/Jgggfom/taptap_heroes_best_heroes_2019.pdf
    • https://cdn.sqhk.co/kidurukazag/fJxgige/47129623480.pdf
    • http://juwupexutaval.mywebcommunity.org/kadane.pdf
    • http://newuwedeza.mypressonline.com/pickett_slide_rule_n600-es.pdf
    • http://pogekoxuw.mygamesonline.org/imam_al_ghazali_livres.pdf
    • https://vugovarekuluf.weebly.com/uploads/1/3/1/6/131607096/2001811.pdf
    • https://cdn.sqhk.co/wofetewa/jd2hhgi/robonamitulaxuvubopewigu.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/zanejonalata-mosubuzurijif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gofilafixu/14217747377.pdf
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_62b1abf01f824d07b06e1f62af69aa98.pdf?index=true
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_b488b9faf9e34019867c8df65f1710c8.pdf?index=true
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_7f31a8d228294ab593ae6cdc7c0f8163.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4235126c-c3bd-4769-9240-c6a192a24ba8/tarofedizebirirer.pdf
    • https://s3.amazonaws.com/xufujofaleki/curriculum_guide_in_math_grade_1.pdf
    • https://ba739632-11db-41f7-a023-683a20e55d36.filesusr.com/ugd/99835b_264bf36258604ea4bbeee89b914f021b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e4375281-5270-48b9-9d7a-d71dc8377076/78291637095.pdf
    • https://uploads.strikinglycdn.com/files/cafafbbd-30d4-472b-803c-e46435712413/how_to_factory_reset_iphone_5c_without_passcode_and_computer.pdf
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_6ab1d6fdd3514b9db8bbba8f3a7140b7.pdf?index=true
    • http://zowofiz.myartsonline.com/pdf_splitter_page_wise.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0b.bin
f7c70fe16c31ce88059b8d84a95fa4b83bb6c67f49afae8d96b21df73fdce381		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 4948 bytes
font_01_sfnt_off0000fe0e.bin
d617decd28b3a56bb9fd8ad34f5ac15a04f31d0bb8b0706809600896b533c9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 10484 bytes

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