Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b9f2d6a800d1be…

MALICIOUS

PDF

88.8 KB Created: 2021-03-24 05:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bc782dba73dece9a517ea1e5d283cbb7 SHA-1: 1ecb469d29ee501e31b600c1bc7e76916dd45309 SHA-256: b2b9f2d6a800d1befca3c2e1329ef955557d7905a4006b391a55add1d22a3f27
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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.
  • 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://crophysi.ru/award?keyword=banting+recipes+on+a+budget+south+africa+pdf In PDF document text
    • http://xawamiwupajev.mygamesonline.org/21523606119.pdfIn PDF document text
    • https://barezixajeg.weebly.com/uploads/1/3/4/3/134318527/67c12db2f.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/bayesian_neural_network.pdfIn PDF document text
    • http://fridgeservice.ru/25545863249rfypv.pdfIn PDF document text
    • http://fesunasisodenod.getenjoyment.net/pemenaguguralubeti.pdfIn PDF document text
    • http://sozawakofuriwoj.getenjoyment.net/8762876876.pdfIn PDF document text
    • http://onlinetiser.website/wixebogowulddr00.pdfIn PDF document text
    • https://posenumu.weebly.com/uploads/1/3/0/7/130776111/migozuwatozigor.pdfIn PDF document text
    • http://changepass.online/outlander_drums_of_autumn_audiobook_freeprzpm.pdfIn PDF document text
    • http://groshyk.site/ronetedovulixecwwr8.pdfIn PDF document text
    • http://kawlites.online/administrador_de_archivos_android_7._1._16ag2j.pdfIn PDF document text
    • https://zosolino.weebly.com/uploads/1/3/4/6/134676828/nupoza.pdfIn PDF document text
    • http://numulul.mygamesonline.org/converter_em_word_small.pdfIn PDF document text
    • http://nutristrike-shop.ru/atypical_pneumonia_guidelines8amwq.pdfIn PDF document text
    • http://summ-ita.space/vulifujemavasemogefiyyi60.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/subway_double_chicken_chopped_salad_nutrition_factsgwvfn.pdfIn PDF document text
    • http://wonnaturila.space/40026714806gg474.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
    • http://difugarulid.epizy.com/kufesevezupune.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/31078012446.pdfIn PDF document text
    • http://zilelinib.rf.gd/58102029986.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/65590508050.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/hardest_christmas_word_search.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/basic_electronics_mcq.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 5456 bytes
SHA-256: 04bf49b697bae4ca7a333e4a19d61798b65cb9073522f741f9d43ba6b4094b56
font_01_sfnt_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 11572 bytes
SHA-256: 79cbd9a92bd9f927241af45498ada6b352bb4a07fcef3546ace252f8af9788b5
font_02_sfnt_off00013268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13268 16136 bytes
SHA-256: 8d0ca5441952925faa6f68d28470995fcd5e3edd800b1977fac83179433ae1db
font_03_sfnt_off00014758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14758 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e