Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b4e489f8126644…

MALICIOUS

PDF

73.0 KB Created: 2021-04-04 07:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 64f5f3c83d68da7eff203d53641aa5fc SHA-1: 178e1263148de92683540536fd97e317742ec994 SHA-256: f4b4e489f8126644dd61de59edb57476daef6e4bae5fb98825d18a4c29cee274
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://resalured.ru/strik?utm_term=how+to+add+youtube+app+to+dish+hopper PDF link annotation
    • http://latuha.com/healing_from_hidden_abuse_support_groupsopvgi.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/7412931.pdfIn PDF document text
    • http://wdd13.ru/how_do_you_clean_a_tefal_deep_fat_fryerre03k.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/vikin3h1ge.pdfIn PDF document text
    • https://duburidam.weebly.com/uploads/1/3/1/8/131856040/sidenetulav.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/cda4a1ff7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/timeziso/72454693895.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_3e1166ab5fa94ebbbeaee0d75b86c033.pdf?index=trueIn PDF document text
    • https://79f67b98-100a-41ac-8a2f-4880133f117e.filesusr.com/ugd/f12c90_3563dc1e765c412982a1aa84eec734d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropiw/fununakibajenepa.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/telukubaxerufe.pdfIn PDF document text
    • https://f8bd9030-4518-40b4-9047-d478e6ffc17b.filesusr.com/ugd/608fe2_7dfb7e356b0e4062acb04bd438397e1e.pdf?index=trueIn PDF document text
    • https://79f67b98-100a-41ac-8a2f-4880133f117e.filesusr.com/ugd/f12c90_2ecb257fc5e44e60afb6b50da564a477.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/67812190805.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/57895355891.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_82014e75f1894a378d80d01abcc18dac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/what_is_the_basic_definition_of_humanism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/993dccc4-fb3c-46e6-b1ee-05b16737153d/whats_another_word_for_hearing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581c382a-42f8-4a98-9f8a-d7d18dc30172/lojuzevozi.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/wabenazomebinorovibito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e698cf2f-8787-4a77-b591-d56a4a59eccd/zejelizebop.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/bernina_1008_sewing_machine_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/11399119687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6beac5-c679-4a60-a0db-94df398d880e/jaxuwidaxufosurezovas.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_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 5308 bytes
SHA-256: e4278a56a1245c15590e133c2cb48d381df48898f4a7b6373e41dcf7ec67c6c9
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 10672 bytes
SHA-256: 7b35e5449e54190d6902c14619a7fd8e8ab2991ac9af57206c3393a935aacd53

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