Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e16cfd34454bd35…

MALICIOUS

PDF

129.5 KB Created: 2021-04-05 00:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f39f464e85aa6b4f57f8fc91113ce867 SHA-1: 2257939db97b71ea0b7558e60fdc4d6cd5440445 SHA-256: 9e16cfd34454bd356c393ff20d2a27ca5344ac259bfbfb36affbf23afe2e4cec
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malicious redirection scheme.

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://mezovuduw.ru/wix?keyword=parts+of+the+cello+instrument PDF link annotation
    • https://soxopumejujaru.weebly.com/uploads/1/3/4/1/134108815/5471918.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/99547740717.pdfIn PDF document text
    • http://linunewilut.mywebcommunity.org/sonic_archie_comics.pdfIn PDF document text
    • http://8gusevshop.space/78666754391quwv5.pdfIn PDF document text
    • http://garant-ritual.online/cisco_asdm_manualdc8la.pdfIn PDF document text
    • http://ita-bio.fun/best_survival_films_on_netflixph5ry.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/1119456.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/used_125cc_dirt_bikes_for_sale_cheap.pdfIn PDF document text
    • http://usacarins.com/jorefii51zv.pdfIn PDF document text
    • http://samemere.mygamesonline.org/dilogupolejatidiledijupeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f80f8258-e4e3-4c14-b8b3-0d30ab383fe1/76721726616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a4f464-c8ad-48f3-85e8-137d7089fa48/wetuvosovolamijezew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4feeaca1-5faf-48a6-81ca-d000551ba4bd/how_to_breathe_properly_during_exercise.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/nirokusireburagovefosurer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadb2864-263c-44ed-8957-8bf87f1d26b5/zuweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eadb829-51ef-45e9-a9bd-8687ce287f1c/descargar_serato_dj_pro_full_crack_gratis_espaol_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6250fe96-edde-41ee-855f-f72b176db6d0/80503734318.pdfIn PDF document text
    • http://satovimowenijor.myartsonline.com/lawazepeziluzigipesudo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A953 5004 bytes
SHA-256: 84ee9c73ae3c8b5d7f395e6e5f127ded972bc8fbc57ad05583fb12a9e688f567
font_01_sfnt_off0001ba22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA22 15528 bytes
SHA-256: 4b3b77ceed3394f4a5d9bf214e5640773f388a7ddb9d24c92dbe43d14822a9b7
font_02_sfnt_off0001ea84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA84 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f