Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e117497b92fdea…

MALICIOUS

PDF

80.2 KB Created: 2021-02-08 23:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 390e33bc5b1cf3899b97aaf8c53673c5 SHA-1: d42295b737e3eb0f954b95c75ea7f99ce84af8fa SHA-256: d2e117497b92fdea68d9531b1af343da015e823bcff4ec4aab97f5204fce51a2
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command, a common tactic to bypass macro restrictions and download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://jottigo.ru/aws?utm_term=command+prompt+format+thumb+drive PDF link annotation
    • https://cdn.sqhk.co/vamunidibu/qtCjhij/18607628329.pdfIn PDF document text
    • https://pukutititoj.weebly.com/uploads/1/3/1/3/131383613/fe6aa7f.pdfIn PDF document text
    • https://moxusovilala.weebly.com/uploads/1/3/0/7/130738705/606b14c998d0.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/Ihciegf/65016188797.pdfIn PDF document text
    • http://kvrovk.xyz/18005989382hgx7m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_5fe8119e3bbd5.pdfIn PDF document text
    • http://feboxazatoran.22web.org/acute_heart_failure_syndromes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366057/normal_5fe1688e8099a.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/WTy7jiQ/space_saver_jumperoo_asda.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/id1jxg1/heroes_vs_monsters_money_hack_download.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/bilejifudoxaviseve3uemh.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/aWgejhz/dead_cells_xbox_one_gameplay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5ff619e94c882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_5fe9c6e4540e9.pdfIn PDF document text
    • http://bandalet.club/40426165496gfkjw.pdfIn PDF document text
    • http://geleostone.online/uk_film_box_office_top_105icib.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/zBhchcu/offline_rpg_games_for_mac.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/pijopizemokilen-sajeke-kejilojiluki-sudonifa.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/gKgfFB4/fatafajururupewumemel.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/ajceNlF/el_pase_elite_de_noviembre_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd68a064d343.pdfIn PDF document text
    • https://vemenujobife.weebly.com/uploads/1/3/5/3/135399872/80604974ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonupov.epizy.com/exam_date_sheet_du_2019.pdfIn PDF document text
    • http://voxotili.epizy.com/34426294719.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_off0000fcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 5176 bytes
SHA-256: 9f17f56234b7420816095f4e3bc3f89fc671fd608f75483c74e2034a1a5d2053
font_01_sfnt_off00010e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E19 10844 bytes
SHA-256: 04dbf85182bb0b22c7551d6915ee065fd5cc19fdc22e62c0d4b50cf994a60c63