Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97093ff1a87712b…

MALICIOUS

PDF

89.9 KB Created: 2021-03-08 18:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8afd55516fa0656cc53fca7dd7cb19af SHA-1: 149c0b94e1309f53171e1774afc8b7c6858e5948 SHA-256: a97093ff1a87712babc796a6e3ed3bf319aec7af93c53b523b334e8aad866c94
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/123?utm_term=severance+agreement+template+new+york PDF link annotation
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/vetovojavu_vavitize_pamidawovopi_pixuwigegesevuj.pdfIn PDF document text
    • http://rutabeno.22web.org/ryobi_compound_miter_saw_10_inch.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/arrival_of_the_birds_violin_sheet.pdfIn PDF document text
    • https://valabonef.weebly.com/uploads/1/3/1/3/131379230/dukuw-tamuzozebunov-xadujofojerowun-titojovo.pdfIn PDF document text
    • https://pebifabo.weebly.com/uploads/1/3/4/8/134892867/lomaxomubo-takigasudolifom-gejegevimeruj.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/infosys_bpo_annual_report_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_603f1adc41ea1.pdfIn PDF document text
    • https://kovexinuzik.weebly.com/uploads/1/3/0/8/130815277/983481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_601582e5af822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_5fe73b506c3f2.pdfIn PDF document text
    • http://fovijivil.iblogger.org/centrifugeuse_laboratoire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vopepogam.rf.gd/5552661231.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_2bfcfb813cf1405486077f6cfbd6dea9.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_863ccbff57f54788b8a8cca7c6a5414c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedesowul/organizational_structure_template_free.pdfIn PDF document text
    • http://lisuronam.rf.gd/zekowisu.pdfIn PDF document text
    • http://negekipewunej.epizy.com/8973817158.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bezaxotanobaninosumobug.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_7b8eaa8d7e744640a0c8b7ab04f21415.pdf?index=trueIn PDF document text
    • http://nazifaba.rf.gd/66282863147.pdfIn PDF document text
    • http://wizuzipureja.epizy.com/10507217538.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/different_colours_of_dachshunds.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/ardaas_karaan_movie.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 5496 bytes
SHA-256: 92fa9e2152171999476290b5314bcaf7a67d5658d7bec65bee620685974635bb
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 8508 bytes
SHA-256: 32057ef33d08355f5fc850f50656a1e0e5750560d47f4efb15fc59e1d2ea0568
font_02_sfnt_off000116f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F8 10480 bytes
SHA-256: dbbbd8acb34d69ea611cdd08283303fa992ae6663319444e20d31819925c1528
font_03_sfnt_off00013af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF4 9392 bytes
SHA-256: e630ef26ae8a2fefad55734809e7cb0bc55ddc39b914391dccc4a46cd599d98e