Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ded811813e7929…

MALICIOUS

PDF

80.0 KB Created: 2021-05-09 02:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8376498104db14f7eeaefa89f6c2713d SHA-1: 2c0e8fe689e94caf65d67e0c3dd923fa6b907225 SHA-256: e3ded811813e7929d359377f553dcfabfc176754b0f246fbe295903ad1b6bc02
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. 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 numerous external links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=how+to+use+speed+dial+on+panasonic+cordless+phone PDF link annotation
    • https://cdn.sqhk.co/xotosobupis/Iirjc7j/loralam.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/seruferepivuz.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ibE5hco/missing_toddler_found_dead_in_neighbours_car.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/hNebMfx/manchester_by_the_sea_movie_trailer.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/91010374076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460255/normal_5ff32f6750ba0.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/dYWiihj/biwinavinig.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/tropic_of_cancer_in_india_degree.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_605630cded283.pdfIn PDF document text
    • https://xisagoruno.weebly.com/uploads/1/3/5/3/135332800/5769637.pdfIn PDF document text
    • https://cdn.sqhk.co/reditifotep/jb0gjjg/maine_gazetteer.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/McJhiha/basement_hopper_window_air_conditioner.pdfIn PDF document text
    • https://wafodalepida.weebly.com/uploads/1/3/1/8/131871454/3544361.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/6540062.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/26602509361.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dususawikupap.epizy.com/the_crown_season_2_episode_10_comedians.pdfIn PDF document text
    • http://kasaliduv.epizy.com/android_app_remote_control_linux_pc.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 5212 bytes
SHA-256: 6f0352c5223011b8889d90f13a26cf67f62f45613e7b7f7f20223dbd170eea9e
font_01_sfnt_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 11064 bytes
SHA-256: 76e50a89ac698e096f87723072da7f9c71128c6d2c6accfb418a00c8aaea5e96
font_02_sfnt_off00011d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2E 16192 bytes
SHA-256: 10dd024b7aca9c0af4782f0042823f5a6a937774ccb4b3ed12dd2ab58f6a5f2d

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