Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f6e90752571a99…

MALICIOUS

PDF

84.8 KB Created: 2021-04-06 13:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd07dc28759a44901aa6929cc3413b33 SHA-1: 08926058e175f433e966d9db55b720f2352e356e SHA-256: c1f6e90752571a99cb0074fefc686e54a62d1dbd7198d91f86a2c529448bdf05
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The primary attack vector appears to be a link farm, with numerous external URLs embedded within the document, likely intended to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=canada+business+corporations+act+pdf+english
    • http://hq-cleartv.info/retulusesupefegojuniwuc6gbd.pdf
    • http://rumurel.mywebcommunity.org/five_languages_of_love_summary.pdf
    • http://hairhome.moscow/tesla_model_3_used_for_sale_usape4tx.pdf
    • http://dithetsen.xyz/notunovurezimils0lkg.pdf
    • http://wellwork.site/delta_gateway_4_in_1_crib_assembly_instructionsebslw.pdf
    • http://eslivdrug.space/dusazukaboramipon1n8yp.pdf
    • https://cdn.sqhk.co/vaxofalu/dghibij/fusadidojemapadakolafeg.pdf
    • https://cdn.sqhk.co/tatudawo/Bjdidij/first_aid_for_burn_blisters_on_feet.pdf
    • http://instapodarok.site/62825731740e3c65.pdf
    • http://slimerecipe.org/quantum_field_theory_and_the_standard_model_by_schwartz4ua0j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xanedemu.onlinewebshop.net/catalogo_hinode_2_2020.pdf
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_476ce5a0e685435f97f7c02526fe3dd2.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_6d6fad6d6b47454aba9498eb382b08f4.pdf?index=true
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_af80d87c551e4ee4a2b8be49f94c1127.pdf?index=true
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_6d98ed090ea7406b87a43b781387b9f0.pdf?index=true
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_b752c3dac77142ecb7654076e1999aef.pdf?index=true
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_750cc1dd3da14f039e9b4ae472ab5f92.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109e9.bin
c0772c9188c6e0a6d52612596ab6a9168793112230f50159ff9458e23c4579fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 5464 bytes
font_01_sfnt_off00011c6b.bin
4a3fd9876ccfa072459376046d102747be3e8bfb1e6984af5e605fb2e63a8b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 12812 bytes

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