Malicious PDF — malware analysis report

Static analysis result for SHA-256 a779fe009e38195e…

MALICIOUS

PDF

73.3 KB Created: 2021-03-06 11:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 395d30f7cad0f69b66c0ba81c27e8228 SHA-1: 63374325b839f508ab672f9f334f1768d19b2387 SHA-256: a779fe009e38195ef1b61132edbcb2a89c9ce42267fe7e70f40dec32e6ebe19b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL pointing to 'golowaki.ru'. The PDF's structure and the presence of multiple links suggest it is designed to redirect users to potentially harmful websites, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://golowaki.ru/aws?utm_term=how+to+repair+a+kenmore+front+load+washer PDF link annotation
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/4846323.pdfIn PDF document text
    • http://6gusevshop.website/lovecraft_country_trailer_episode_8io5r0.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/SuVjOhj/mini_golf_courses_near_me_open.pdfIn PDF document text
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/6338965.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/Lqihdic/epic_games_launcher_mobile_rocket_league.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_6022732d42ba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_6019c4ec292e7.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/hcijicl/white_hat_hacker_community.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490132/normal_6012a8a828b03.pdfIn PDF document text
    • http://shtancircul.site/n_t_d_full_formhlvox.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/bulikawezobizozudob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385852/normal_5ff7a2a904081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377902/normal_5ffcaa4cbffae.pdfIn PDF document text
    • https://gizituxozofu.weebly.com/uploads/1/3/5/3/135303534/f100674bf90b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/be085a9b-fb31-40b4-8116-d0978c7e8e43/polinebizagagego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376c62e5-af8b-4d68-a349-589f6eed3e11/fejajatenelupugomex.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/adani_transmission_ltd_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d898ec3-b567-41b1-aa63-f54f30f19f48/nalodizazifolel.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/file_explorer_root_browser_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/punatowutekak.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/28130776814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf3ae58-ab9c-4136-b964-51ea68c9a824/what_literary_theory_is_noli_me_tangere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1fec4a-e691-460f-8ee1-9121cdeb5999/learning_c_programming_language_in_hindi.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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 5396 bytes
SHA-256: 2d29d9e2ddeea2ccc50d75905cfb155a22e8664ead2b3919b9a930aec479f39a
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 10308 bytes
SHA-256: d09bfad681e725ae487e1f2c0f21182668cf24c9e2fee8fcc87b256a6334fd84