Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b74702f4618e697…

MALICIOUS

PDF

74.3 KB Created: 2021-06-06 06:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 77ddfdc4c47c55092b77bc145b3f8eab SHA-1: e3b97315ddfc4bdb807e246d194bb25f435a2359 SHA-256: 0b74702f4618e69709facaddb84d6cc5093d81e76abedc31f07d2c1174c6e176
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malicious redirection attempt. The ML classifier strongly indicated maliciousness, and the presence of external URIs with UTM parameters further supports a campaign to drive traffic to potentially harmful sites. No scripts were extracted, but the overall structure and URL distribution are indicative of a malicious document designed to trick users into clicking on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://huntic.ru/pbw?utm_term=division+de+decimales+para+sexto+de+primaria PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5ff781beeb4c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6048c69eac755.pdfIn PDF document text
    • https://milafesubori.weebly.com/uploads/1/3/4/7/134745217/rubuzupexemulax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_60589f6ab9f66.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/betivujelekip.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/vizumegabuj-lupadivenuk-vabepirofabo-sosumav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423594/65741816773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec0f4b1-2a8b-48f1-9b65-77827fe774a7/hockey_goalie_stick_sizing_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a13130e8-7ff5-470e-9f54-b7638e913b45/zawox.pdfIn PDF document text
    • http://tekitejug.pbworks.com/f/disade.pdfIn PDF document text
    • http://juvudibip.pbworks.com/w/file/fetch/144582129/71915277356.pdfIn PDF document text
    • http://guronavageba.pbworks.com/w/file/fetch/144514647/pewezufobe.pdfIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144466683/the_crew_2_trainer_2021.pdfIn PDF document text
    • http://daridameku.pbworks.com/w/file/fetch/144595422/default_password_alcatel_lucent_g-240w-a.pdfIn PDF document text
    • http://bamedun.pbworks.com/f/crash_team_racing_para_psp_iso_espaol.pdfIn PDF document text
    • http://lodedeti.pbworks.com/f/magic_tree_house_haunted_castle_on_hallows_eve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec1375c-9959-4f0c-9219-bfba9fd56eb5/lepavef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a0959b-0d8a-479f-b4c2-44bd76a70166/situgid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27d5a79-355e-4a3c-931b-375d80807338/how_do_i_reset_an_rca_tablet.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/kupozezobevobizevoxoziz.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/ruwumivativi.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_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 5348 bytes
SHA-256: df7aaef7bc8f965f2f6897f05dbeb9f59011362ab548d10aefc419f4564b4358
font_01_sfnt_off0000f22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 12252 bytes
SHA-256: 225ce127c75841402f380e91e074a37238320f930319b1871d4c5b674163ea89

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