Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f99ad8de9c70ea…

MALICIOUS

PDF

77.8 KB Created: 2021-05-19 03:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d48b28654842e8d05850a4f2ec7e7021 SHA-1: e3dc140285eefb96c1d01d349b646ed8d01b8da3 SHA-256: 42f99ad8de9c70ea8489209620b2ddcccdf704a56520fb6670e384d964db1fb8
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external links, including a primary link to 'https://baarspo.ru/strik?utm_term=how+is+weighted+moving+average+calculated', suggesting a phishing or scam attempt disguised as a search result. The PDF also contains a link farm with 30 external PDF links, indicating a potential SEO manipulation or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://baarspo.ru/strik?utm_term=how+is+weighted+moving+average+calculated PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5fe954f5ec86e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_600543dc8d484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_6061c0d92657b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_604b1ca5eacfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_605f5c28e9566.pdfIn PDF document text
    • https://rigagebefizo.weebly.com/uploads/1/3/4/6/134631069/6182914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_601c8809c6d98.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/6221675.pdfIn PDF document text
    • https://bigifami.weebly.com/uploads/1/3/1/4/131407708/5838184.pdfIn PDF document text
    • https://liwarelavoz.weebly.com/uploads/1/3/5/3/135398493/bafibazave_xakada_pafesi_wibudesajejoxi.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/96f58e1a-1d5b-4dc0-8c4a-f74249abeefc/swtor_patch_6.2_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c004aa-406a-4563-b2e5-bd20b4c083db/black_ice_on_road_fort_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed7667d-64a5-4aeb-8c5e-aa9c06f660f5/html_element_select_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2b36f3-2a1a-4c39-a667-8377326692d0/42595852685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cbe422e-fa9e-485a-8839-fc93709d7854/vepowaxoluzodumebame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4604d0-6778-436b-b3d5-b14dbe55e899/vampire_diaries_season_8_finale_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb8822a-90a3-4429-a6d9-637ae1b1871e/timilaborugepegegitidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d902de-22a1-4b0b-b9ac-e9ac784141a8/87019219797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10c7a52-d1cc-416b-aa93-98eda3ea26c3/best_diet_for_type_2_diabetes_and_weight_loss_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ce2a09-38e2-44f7-b9df-7b607c2a1934/binewed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c644f9-0eb7-4663-b0fb-5b10391eb27e/vasajezizuletiwemunavamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7493d726-642d-41d3-ad16-f83077b970f8/manual_de_camara_samsung_wb1100f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb8e4e8-134e-4af0-8c3e-480d9dc67be8/vuvoronis.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_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 5464 bytes
SHA-256: 098d95a32a6336292c60537bd3f3da6f08a1cb403dc765aa77bc2b65667a62bf
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 10808 bytes
SHA-256: b4379d4f95dfc7453c0b20f2ed455aeae43040a582526d33d1a031bbdb3b834d