Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e27224427c06f7…

MALICIOUS

PDF

89.2 KB Created: 2021-04-01 06:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: feafda903952615858b557a4bcd40f00 SHA-1: 3cbe64c1d97a4bd41ffe5da4bd17c745f633d655 SHA-256: 55e27224427c06f747a2b533afdd61c52f7aa903da914911578916df12629ec5
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=pso2+hero+class+guide In PDF document text
    • http://xufededubumavif.scienceontheweb.net/garmin_gtn_750_installation_manual.pdfIn PDF document text
    • http://jinobuzid.scienceontheweb.net/50922667526.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/dic8ijd/dunk_line_advertisements.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464302/normal_5ffae5cf56834.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/gHIgigj/marxist_criticism_theory.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5fca9619b3d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_6016157c3fc47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_fdb51d4ec59d4fe795fbd02713c41b7a.pdf?index=trueIn PDF document text
    • https://e714dd98-3e42-4604-aba1-6d4b2506b1a8.filesusr.com/ugd/742965_b9fbf76e6b48401baf942881e2747fbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/faresunozumisizab.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/xalupuko.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_462fb280448949948b2c9c5bd8528b54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/aneurisma_del_cayado_aortico.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_12e923ff45974c5e8b5d3235b63f8cda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/82764866046.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/wifibudomivaxaren.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/13763496864.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/19085349740.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/nimasafenidugonetikijajow.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_a90135c956a34c02b54bd3c0c95afd60.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001110d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110D 3672 bytes
SHA-256: 8c92e915cd7644439c443d30eb11a3c85fecb472b9bb5d8394a36112187d4f3b
font_01_sfnt_off00011e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E05 5332 bytes
SHA-256: 5765e4dd20e8c725a9cfe17eb2268897efdbc768bdfffb3bc7c7ae1f76a9eb4d
font_02_sfnt_off0001301f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301F 10956 bytes
SHA-256: 57bdabe09227c07d3f9cf12adf4fb7744be548399511d5c4dee226e0937b4464

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