Malicious PDF — malware analysis report

Static analysis result for SHA-256 d124a882655a29ad…

MALICIOUS

PDF

100.0 KB Created: 2021-04-23 20:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 34378192b474b52ac39cfd5e5fc651ff SHA-1: 20ff49b7bf09dee3cc713b9d382928387b5ac490 SHA-256: d124a882655a29ad7688c6ef7ea5fe32200b93338dc799f19111521d509d3805
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, which is indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the embedded URLs and the PDF structure itself are the primary indicators of malicious activity, likely serving as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://zajinet.ru/strik?utm_term=the+pact+jodi+picoult+movie PDF link annotation
    • http://fruitslope.online/253863940971a8vn.pdfIn PDF document text
    • http://bt-management.website/fibakaxififods7os.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_606dd0b56700c.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/fejuwejavulafavarikofim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc607db11aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_601d2ae9ae598.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468814/normal_5fe060107ef55.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/1_cup_cooked_bow_tie_pasta_calories.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_606dc90dedc10.pdfIn PDF document text
    • http://cabinetshq.xyz/garmin_map_62s_reviewixoeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_9bfb6640d8f745cc9c6a858ac036bfb8.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_724c6fb66abf4f60ac5b99dc4b6ffdf5.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_11e7aa3c009b4d818ffdd284d4c185b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76a2425a-4162-43b1-b80c-5871ca797f68/equal_protection_before_the_law_meaning.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/2020_calendar_template.pdfIn PDF document text
    • http://jajogagek.atwebpages.com/what_are_the_steps_of_lean_six_sigma.pdfIn PDF document text
    • https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_8baf145a1715494582ac78c7e9d8b0b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce0b2a0-5ff0-42a4-b63c-3a7a1151940b/wisasovul.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_1722470cd51b49cd9fc365e9f51748ec.pdf?index=trueIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_271925c024a740fcacbdf54f10294d88.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_a8310e4067d348f3be84dfecd7d5274d.pdf?index=trueIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_48b07341aaed41428f3e2c0be9efaf86.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1cc609-aa05-412b-a7b2-3b934c5db9a0/bafaxixasuvef.pdfIn PDF document text
    • http://ferodibev.onlinewebshop.net/81735499308.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_cbe8aec74d824b65a347eea658f60a54.pdf?index=trueIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_9cccf2077f1b4baab7931aa93324769c.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_off00013b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B96 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off000145d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D9 5124 bytes
SHA-256: 3d0a261a999ea4b4443953ab9dffb4c11935bdaabc5d4c759e61ea3a20a87f5d
font_02_sfnt_off00015730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15730 12136 bytes
SHA-256: 58f7f21fbb25627ff0766e75b6a2a92dfb2e8299e7ad200a33e1b36fa8090adc

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