Malicious PDF — malware analysis report

Static analysis result for SHA-256 191a16e9541d92d0…

MALICIOUS

PDF

82.8 KB Created: 2021-04-01 23:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4e3acdf17acabb443f6f95296f145263 SHA-1: ffbadeaed2d1caf64bdfdc6e92ef547247af2e0a SHA-256: 191a16e9541d92d09ae610ff2c6d94829a2b5568a055095bebbaa5dc2dedeccc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious content delivery, potentially involving embedded JavaScript for redirection or exploitation.

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://vilenefex.ru/wix?keyword=pokemon+ranger+guardian+signs+wifi+events+action+replay+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445557/normal_601b27af29c35.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/hi7hbOb/quattro_giant_four_in_a_row_game_set.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506170/normal_605058c0ab927.pdfIn PDF document text
    • https://zaxavafu.weebly.com/uploads/1/3/4/3/134323176/jafugotove.pdfIn PDF document text
    • http://tevfikyuce.xyz/app_para_comentario_biblico_adventistaqso32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_6021995cbaba8.pdfIn PDF document text
    • https://nezemugobif.weebly.com/uploads/1/3/4/5/134519414/57a345e.pdfIn PDF document text
    • http://rawenspant.online/67515555748g8sxt.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/rojipezeg_tozunelevudes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483610/normal_5ff66b345fe92.pdfIn PDF document text
    • http://aov.one/ftl_zoltan_ship_unlock_guidebxhch.pdfIn PDF document text
    • http://cadenalia.com/la_chartreuse_de_parme_chapitre_35emck.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5fffed939d01d.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/SgjjgiH/sagodusepajig.pdfIn PDF document text
    • http://fly-drive.online/biganiwedezunh29i3.pdfIn PDF document text
    • http://awpmode.com/kanizufelixuwiridapakofol3vge9.pdfIn PDF document text
    • https://cdn.sqhk.co/taxosavasesa/gLpZghp/15345485230.pdfIn PDF document text
    • https://gujibukogise.weebly.com/uploads/1/3/1/3/131380045/8cc519feb345a.pdfIn PDF document text
    • http://arenaprobet.com/reped39oia.pdfIn PDF document text
    • https://lebivituwaw.weebly.com/uploads/1/3/1/8/131856954/829721.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_25bc7b12f11a4841845e5183211eb59a.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_a5ac66b65dc64811aa4a95dbe4e6a74e.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_6613a2238095489d8eee95acfa8ac49d.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_5110d503e3ab49b394b09eadd9c50601.pdf?index=trueIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_8031a1ce2fea4b9f8a77d3fe18cf2bc7.pdf?index=trueIn 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_off0000f60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60B 5676 bytes
SHA-256: 64b14e6110e7133591a0d7a6a459857a8e6971676844bc09482bcf2353b6b4a3
font_01_sfnt_off0001095f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 10984 bytes
SHA-256: 303a9b21bdcbf2af86b079cf7c288fdb9c0328ccbd0f5a14f3144b98f31591fa
font_02_sfnt_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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