Malicious PDF — malware analysis report

Static analysis result for SHA-256 008a94be46452c5b…

MALICIOUS

PDF

67.0 KB Created: 2021-03-20 16:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0413c1c74304d5acfb43e8ca2cbc2252 SHA-1: f1154f47dc9217b8db757de0e53507cbc1aa8187 SHA-256: 008a94be46452c5bcb24b5a1e890a037b43e3a9ff4f2d6ca1d082c1a576b4349
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable hosting, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URLs and the nature of the heuristics suggest a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://kewotij.mypressonline.com/xagirisupufasalafevij.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4391620/normal_5fe03ab7360ec.pdfIn PDF document text
    • https://kotutoxegaru.weebly.com/uploads/1/3/2/6/132695780/ravatubowe-gifupikoxuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_601b504cbc692.pdfIn PDF document text
    • https://sotinele.weebly.com/uploads/1/3/4/6/134640455/tafado.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/zitidakubegekatunupogosoz.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/66986592986.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/logowiludur.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/76311184978.pdfIn PDF document text
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/tojibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dN4lCoxrs6M/wb?keyword=wordly%20wise%203000%20book%205%20lesson%2013%20testPDF link annotation
    • https://uploads.strikinglycdn.com/files/48d15b9a-465b-4382-be37-0143dde01671/ipod_classic_30gb_5th_generation.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/vilogajopiwupumesefirovej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62df9e35-6c9b-4a32-bf33-213657c2bf29/monster_island_movie_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb4bf83-1ff9-42d2-9f83-f3d1acd14fd8/kokuzoxoxinetopajiba.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/12180492746.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/universal_laser_systems_pls6.150d_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b5fe3f-0e7d-4b20-8f6c-9351776571b0/93474939681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553cebb4-e83c-431f-aa5f-3860151e772a/noxapakizabagubom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64d38ed-0ec0-4106-b310-62ab6933539b/can_i_study_for_cfa_level_1_in_2_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c12d8d-7e82-47dd-9ee4-16d1362a744b/hp_500_designjet_printer_price_south_africa.pdfIn PDF document text
    • http://tudugir.atwebpages.com/boitempo_drummond.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_off0000ca40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 5504 bytes
SHA-256: 8deeb02364500eecf6c6ffb23f32538d44f887c5ce15de95e32d238f98a10e7b
font_01_sfnt_off0000dd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD30 9880 bytes
SHA-256: d0bb732eeb09d86a70bde8e3f056ba01eebe60ec10e21df8bb6bf39d7c18f809