Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e3ee3acd82e35d…

MALICIOUS

PDF

96.5 KB Created: 2021-05-19 20:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 73b2c289c9b6f4dcd2038c4ef5a911a5 SHA-1: d938f0868cd5df760e1c12b882bdb8ae9031b8b4 SHA-256: b5e3ee3acd82e35d2e387b1cb7a0216673a52d128529459675b705f1eed49c11
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=how+to+find+etf+dividend PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386622/normal_601ee5f65e632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483349/normal_6033ae86a6af4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_603a1415a86b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_602936699f14f.pdfIn PDF document text
    • https://gitapobukelagij.weebly.com/uploads/1/3/4/2/134266265/4138649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_6060203421e85.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/gafirotilivijim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5fcbbdbfa28b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_60226551a49c8.pdfIn PDF document text
    • https://sebikiwar.weebly.com/uploads/1/3/5/9/135962157/meniwurikog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd925866-56f3-44be-b9fd-744eeac9067c/cinemax_nitra_max_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29d887c-0bc1-483b-aa21-9b2f71e029c1/how_to_clean_kitchenaid_convection_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95cbfdf-8f24-4795-ba44-049e6ad031cc/traffic_rider_mod_apk_download_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4adf35-8931-41f9-bc5d-a0bfadf85a30/vofiwijuzigovape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736be239-7367-471c-b0e9-d711130fb877/cuisinart_dcc-3000_coffee-on-demand_12-cup_programmable_coffeemaker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7153a68f-4000-471b-a975-7a9fc2587370/denon_avr_791_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3e618b5-378b-4ad6-a630-38af98a579a1/albert_bandura_social_learning_theory_in_the_classroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ef07a2-5634-4315-9dea-9bd68eee4e6f/sharp_aquos_70_inch_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf626f9-5818-4dba-a985-f6700f33c443/cpm_algebra_1_chapter_7_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85724b6d-b837-4437-a973-980965278936/4199710991.pdfIn PDF document text
    • https://www.etf.com/sites/all/themes/etf_com/images/logo.pngTheIn 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_off00013cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF7 4500 bytes
SHA-256: 82d4e12252e16814adce41a48e06254240c7cb9175374d57b24fd78c97d816c3
font_01_sfnt_off00014c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C70 11800 bytes
SHA-256: e9d13379873d6abf07df03d1e06c6594faeb836a8a3be0f6f2fc6cf32de9c907

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