Malicious PDF — malware analysis report

Static analysis result for SHA-256 52df8fc42ebe943b…

MALICIOUS

PDF

92.4 KB Created: 2021-03-24 13:36:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b8f1daa9c127dc0318eec57ca6c282b8 SHA-1: 4df888aba407b2804dd2374a5570fbd3a5af9f8d SHA-256: 52df8fc42ebe943be471b3b0d2fb02466259842d2297bfbf983a0e5e0152eedf
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to manipulate search engine results or distribute further malicious content. The primary external URL, https://baarspo.ru/award?keyword=vrischika+rashi+2020+telugu+pdf, is suspicious and likely leads to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://baarspo.ru/award?keyword=vrischika+rashi+2020+telugu+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fe0137a56c3a.pdfIn PDF document text
    • https://cdn.sqhk.co/fezajuwu/hcidQ8k/68664500019.pdfIn PDF document text
    • http://sasavojaraw.iblogger.org/professional_cv_templates_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/nolugavetiri/ijgZhdN/zovenorodoveror.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_604713307a0ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_604632ff361f7.pdfIn PDF document text
    • https://cdn.sqhk.co/bawevabob/Tyq3wLj/vilogorukil.pdfIn PDF document text
    • http://mexuloxuxinona.iblogger.org/cerf_volant_de_kaboul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_602b5a8e4e6da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5fde827a87575.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/ihegdic/national_test_abhyas_paper_download_neet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376103/normal_5ff65c6519299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_603e54e416b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_601e1e96b6508.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/hhzja56/mobile_patrol_app_arrest_records.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/hiSjogj/jamedikerag.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/6icjbaN/84312501199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422658/normal_6016044a8a5df.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/jaHNDhd/78464840623.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_ed199e23bcdc4521b25847fae9fcace4.pdf?index=trueIn PDF document text
    • http://naxokagad.epizy.com/araba_oyunlar_apk_para_hilesi.pdfIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_0e09efe9aa484420b7c75f88b56b47e8.pdf?index=trueIn PDF document text
    • http://zeviruzokosobi.epizy.com/fusionner_des_fichiers_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD884 5720 bytes
SHA-256: ced77b2ddc249feca9625d62a564697963122844d8566ae25e0828e979929a37
font_01_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 41868 bytes
SHA-256: 4be9b84a4efb74ca6920506ecdbca801ddb64aa3129c92dfcd61b89501fc489f
font_02_sfnt_off00013e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4E 10332 bytes
SHA-256: 5b6aa8d91969bfcc253f0fadd4581ba6cd4b557b4ed9b75b8c0bc18966eab0e6