Malicious PDF — malware analysis report

Static analysis result for SHA-256 f363d469955e9d6a…

MALICIOUS

PDF

84.9 KB Created: 2021-06-10 11:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d9ef4d06b437a5bfb462f6a800b9bb28 SHA-1: 23b67a7bb1789cdd3e0b8ba53e902fa5862638af SHA-256: f363d469955e9d6aacd5b3d933daaabc336b0ee7b88504b961744d3007242b63
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 0.9961

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://nomylo.ru/pbw?utm_term=how+to+check+saved+wifi+password+android PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4426271/normal_60b5869ed5b8e.pdfIn PDF document text
    • https://vowomupow.weebly.com/uploads/1/3/4/8/134846305/a1debb.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/1286716.pdfIn PDF document text
    • https://jokoturatel.weebly.com/uploads/1/3/5/9/135993825/lojuzepafunumidazed.pdfIn PDF document text
    • https://wafumaxa.weebly.com/uploads/1/3/5/4/135400811/e2d32f5930.pdfIn PDF document text
    • https://vefawotujetebab.weebly.com/uploads/1/3/4/6/134651081/wazawuvol.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4459917/normal_60b18f5457cd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445742/normal_5feeceff4431e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_60669b63b57c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_60433256d542d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_6018a3288d884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_60489bfab2270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377100/normal_5fe2b638333f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_6027c1e3cfcc7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mutoteja.pbworks.com/w/file/fetch/144515052/beauty_and_the_beast_2017_full_movie_dailymotion.pdfIn PDF document text
    • http://momoruxoxim.pbworks.com/f/seladozijoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64680a98-157f-414d-999f-c0e0e3258d13/on_writing_well_chapter_15_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365e85c1-26a9-4446-ab2e-3ba4ac85b554/is_the_final_destination_on_hulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f7ffd5-ed26-4cf6-bb5d-2c3b74046b57/duxariwatenetol.pdfIn PDF document text
    • http://veweran.pbworks.com/w/file/fetch/144905037/how_to_look_up_value_of_pokemon_cards.pdfIn PDF document text
    • http://kekivozafiko.pbworks.com/w/file/fetch/144625500/entomology_worksheet_answers.pdfIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/30129911986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f237f080-2dc7-41c7-9752-f1ad03452a6c/what_animal_is_shere_khan.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144678351/takatere.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/f/how_to_treat_a_sick_green_cheek_conure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d01f0a7-979c-45c5-b323-a49feb8160ac/jatisumofuxasujomotojul.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_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 5388 bytes
SHA-256: b711920c61261e222d4b4a58c767ec66991292409e82248919907c2422ffd20b
font_01_sfnt_off00012072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 10804 bytes
SHA-256: cc787d6a4b1dc8cda9319fa594500b80088a681bebc9c47cf6201feb9a011858