Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b026cbd92b7f8dc…

MALICIOUS

PDF

84.4 KB Created: 2021-03-25 00:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a13453721be3a3500be3377403dc9bf5 SHA-1: 934563aa46169aff81887f9184419db181d7bda7 SHA-256: 7b026cbd92b7f8dc4a882151438907fb40d0ca141166ba84ee306a90654fdc01
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://resalured.ru/wix?keyword=same+side+interior+angles+definition+geometry PDF link annotation
    • https://burerekubexu.weebly.com/uploads/1/3/1/3/131381452/110de8.pdfIn PDF document text
    • https://fuzurisef.weebly.com/uploads/1/3/4/3/134369427/bawonoloteweluziteb.pdfIn PDF document text
    • https://karesaxu.weebly.com/uploads/1/3/5/3/135392924/gonese.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/992583.pdfIn PDF document text
    • https://netebina.weebly.com/uploads/1/3/4/5/134596662/14944.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/neato_botvac_connected_replacement_battery.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/8989701.pdfIn PDF document text
    • https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/839063.pdfIn PDF document text
    • https://kizuzeno.weebly.com/uploads/1/3/5/3/135326612/zubanuk_tinufekegebip_jabolorelumexe.pdfIn PDF document text
    • https://nujazovarurep.weebly.com/uploads/1/3/1/8/131856890/5ace95a40da.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/67212214310.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/b748a546-aa84-4587-9dde-5a757e89bc74/fufemimefokiweboragisivux.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/messenger_lite_9apps.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/70847473812.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/allahabad_state_university_degree_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/25067250762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cdc8b0-61b6-4093-9530-4d3d708ec1cd/sanokabogiko.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/makitupixodozemefefexuse.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 5432 bytes
SHA-256: 0dc793de72d0615b981f3f9619e9b0ac2480882c22a22232006faafd0bc0ccb2
font_01_sfnt_off0001054a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 11768 bytes
SHA-256: 98a862e745d1df7ed20d912977e08213f364886c9e1bbd28bc8c4da2c3602c1f
font_02_sfnt_off00012d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D15 16072 bytes
SHA-256: 062f8a7185608a18dbd56baf48eb14c791e3c6ea8866a2ddd6a03467109098f1

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