Malicious PDF — malware analysis report

Static analysis result for SHA-256 0883db0794a045fb…

MALICIOUS

PDF

65.6 KB Created: 2021-02-21 15:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 775957c1694c39766345db70fb869591 SHA-1: e7633bbf26d6ad7f6382e856a8a290f977958ab0 SHA-256: 0883db0794a045fb6d5ab9247c806eece44863e30c4da161d548031ea8617d81
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors or disposable hosting. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strong intent to redirect users to malicious sites. Although no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=indian+law+books+pdf In PDF document text
    • http://bupro.asia/20091623938yasb3.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/g1fBJEE/58306670531.pdfIn PDF document text
    • http://amst-watch-v1.club/ap_calculus_limitsqbjkr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476564/normal_5ff1829bf402d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5fe223849ddbb.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/2zNoxZZ/pogromcy_duchow_piosenka_tekst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_60310a368b5d6.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/zjdRnhh/14520728280.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/2GCidQ9/crazy_taxi_driving_games_jeep_taxi_simulator_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384634/normal_60288a20bd02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_602fa611a69a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nopizapokife.epizy.com/98465351502.pdfIn PDF document text
    • http://losagamadupo.rf.gd/lanozejodu.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/play_bejeweled_free_online_no.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/agenda_2020_excel.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_off0000c4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CB 5172 bytes
SHA-256: 73f14661d1b36d6a103c1a63137fed56f588771bbeb74f73039daeab59c8252a
font_01_sfnt_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 10308 bytes
SHA-256: 6fc68ed58de4818f55678b9594281621afa3f6e5f79ea427f0f846b085c9b2b4

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