Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd86d1b5e25665c…

MALICIOUS

PDF

78.0 KB Created: 2021-03-27 09:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00a8ae7815a19624c17ecfd786e35ef1 SHA-1: 469a2a2b8e25439358006d4e3f8feb2c52d04961 SHA-256: 3dd86d1b5e25665c443e5618994c7257ab37c2af27bf0ba3015a6ce0761bf97a
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a PDF link farm. The document body, though heavily obfuscated, contains text related to 'Silver tabby cat with blue eyes' and authoring application details, suggesting a lure to disguise the malicious intent. The numerous embedded URLs point to a link farm designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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/wix?keyword=silver+tabby+cat+with+blue+eyes In PDF document text
    • https://cdn.sqhk.co/norejasiwiza/iUwgcWp/sopekibijefaxekelasazu.pdfIn PDF document text
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/kivigile.pdfIn PDF document text
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/puxutugolum.pdfIn PDF document text
    • https://wedidosav.weebly.com/uploads/1/3/1/6/131637371/jarulirof.pdfIn PDF document text
    • http://gixitetopes.scienceontheweb.net/sistema_endocrino_anatomia.pdfIn PDF document text
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/kalexiten_ribod_letotatoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/hfqhjEn/bounce_back_big_sean_clean.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/5905280.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/unleashing_mr_darcy_2016_online_subtitrat_in_romana.pdfIn PDF document text
    • https://zunitilamurako.weebly.com/uploads/1/3/4/5/134529552/817a1bf.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/MsgiQcm/hatchimals_colleggtibles_series_6_one_dozen_egg_carton.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/crheZS8/8_ball_pool_hack_2020_no_human_verification.pdfIn PDF document text
    • https://gewolurigidanax.weebly.com/uploads/1/3/1/3/131383018/04c37.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/7e11c.pdfIn PDF document text
    • https://tilipigenetuwa.weebly.com/uploads/1/3/4/7/134770736/pomifenatixevut_baxososuxed_fetepadobeso.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/xevetudizamoni-xizujevaxumak.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/segmenting_targeting_dan_positioning.pdfIn PDF document text
    • https://cdn.sqhk.co/kolazapikib/gUBifid/babutig.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/clasificacion_de_las_empresas_segun_su_tamao.pdfIn PDF document text
    • https://cdn.sqhk.co/juputufom/jbZan2b/54816725466.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/aO1PDxh/neo_scavenger_hacking_software.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/AUjgmha/xutinof.pdfIn PDF document text
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/kofodig.pdfIn PDF document text
    • https://sosakenokez.weebly.com/uploads/1/3/4/4/134445245/3091291.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famekuputoda.myartsonline.com/43526470928.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 5384 bytes
SHA-256: 68ecea72c753f43eeba7b9466c78379f872bddc774252e17a28a7c6398305914
font_01_sfnt_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 10808 bytes
SHA-256: 8f9d4456a0a1c727daa4c9b15c1db76359102480d4ab02e671cc1e5b7e381354

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