Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1016f686fab8f05…

MALICIOUS

PDF

80.3 KB Created: 2021-03-25 02:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9d462c49558fbc5ed992abc3e93bd3a6 SHA-1: e31857bb08342266fa8748c825368a4fed003125 SHA-256: d1016f686fab8f05a3f1a06b44f995ecf7bfa4c6d9f89b1d52a4321c67e2fabd
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 of which point to disposable hosting and appear to be part of a link farm designed to attract traffic. The primary URL, 'https://jumiwimov.ru/strik?utm_term=what+are+xbox+live+gold+codes', suggests a phishing or scam attempt by using a common lure. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

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://jumiwimov.ru/strik?utm_term=what+are+xbox+live+gold+codes PDF link annotation
    • http://wowitaly.pro/rotenox8pfj8.pdfIn PDF document text
    • https://vobelorigod.weebly.com/uploads/1/3/4/0/134096073/a495e0c493dd209.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/linear_algebra_4th_edition_bookpy6n3.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/nitozojepawa-rujomizunojel.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/vhjYjiu/jackass_gumball_3000_stream.pdfIn PDF document text
    • http://kukushpa.fun/lugulilivovetulopedil251py.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/eijhfhe/fnac_shadow_candy_jumpscare.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/ti_sao_file_khng_in_c.pdfIn PDF document text
    • http://50offshop.pro/test_de_caracter_y_temperamento_para_imprimirn9cbl.pdfIn PDF document text
    • http://sodahq.club/652848362797ae37.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/zexutinixin.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/516bcf98-ed64-4654-9a7e-ca08953dd1c7/98087587232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64854634-c110-453b-9c12-4624b7bdf64d/prisoner_b-3087_audiobook_chapter_17.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2078fd58-fed4-45fd-85d5-4b508b8d8180/16467170270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8487cf10-0a17-4a54-9df4-cfcab7fb73ea/star_and_marcos_guide_to_mastering_every_dimension_stump_day_edition.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/843794978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a4f694-8319-4bbf-9b44-e52fe828bfcf/how_to_change_the_input_on_a_magnavox_tv_without_remote.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/ahsanul_bayan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233d94ba-6b2d-4281-8a6f-264c98110b09/wujapetererulaludumus.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_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 5480 bytes
SHA-256: 2b291c5b74ea86f93f8bcc98eba4a7714b7e970955b6412f8b6ee7b4ea26367b
font_01_sfnt_off00010aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEA 12492 bytes
SHA-256: d2f56bf801fba3b4358470bf62f56326b7570afa82662cea59a71e6e50e5cf0e

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