Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fd6bf4f33cdb95…

MALICIOUS

PDF

86.2 KB Created: 2021-03-24 10:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 13f690bf972be205d322393d37a04b4c SHA-1: 0bdf4bdc9493eed5ba360fe81ebe329254589ed9 SHA-256: 72fd6bf4f33cdb95540018ca476bc47022130fe60479e359b5ba50a243127237
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to PDF documents, suggesting a link farm or phishing lure. The primary URL, 'https://xajibur.ru/wix?keyword=meadowbrook+high+school+ohio', is presented as a search result to trick users into clicking. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=meadowbrook+high+school+ohio PDF link annotation
    • http://megalit-korolev.ru/understanding_cryptography_solutions_manualas2aq.pdfIn PDF document text
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/3da5aba653cf0.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/beadle_and_tatum_experiment.pdfIn PDF document text
    • http://cafechorsu.ru/salugezamlerso.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/diccionario_biblico_completo_gratis.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/ketogenic_diet_cookbook_free_download.pdfIn PDF document text
    • https://xawuvokepixa.weebly.com/uploads/1/3/4/6/134617960/7128218.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/applied_economics_k12.pdfIn PDF document text
    • http://tozemudezajif.mygamesonline.org/revutawakomud.pdfIn PDF document text
    • http://tvoyoproc.fun/62397452228m1h1o.pdfIn PDF document text
    • http://itslm.fun/ary_news_the_reporters_todaykpdjo.pdfIn PDF document text
    • http://riwaxutitono.iblogger.org/instrumentation_construction_engineering.pdfIn PDF document text
    • http://arendagg.xyz/foxit_printer_windows_10y8e46.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://s3.amazonaws.com/ladiwuzetawedi/68485715356.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/xataxusejaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/80833021989.pdfIn PDF document text
    • http://gevogorusitaw.epizy.com/vanilibudoruvig.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/engineering_lettering_guidelines_2_4_4.pdfIn PDF document text
    • http://nudobovedazopor.epizy.com/antibioticos_naturales.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/platform_bed_full_with_storage.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/aeronautica_imperialis_rulebook.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/tekitejapaki.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/27774316066.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/mcafee_antivirus_free_full_version_2018.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_off00010496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10496 5104 bytes
SHA-256: cbb30df2965d39aef8b52e8d6b95f83f181a0590558a444f9420e50661493911
font_01_sfnt_off00011613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11613 11112 bytes
SHA-256: a620d95264c254d1d68314ec2bae206496923968fbb87751a8d030c7a5aa000a
font_02_sfnt_off00013be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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