Malicious PDF — malware analysis report

Static analysis result for SHA-256 6666c2b9a543953c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-07 15:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2bf87e217a2fd5e6646ca16e938296e4 SHA-1: 58fdedb0213bde7fb6e36e01894ecd15568c042c SHA-256: 6666c2b9a543953cb1ff04f325b97086366f88ec45c923b090909536e4628e8a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to distribute or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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://jumiwimov.ru/wix?keyword=high+school+story+apk+mod+5.4.0 PDF link annotation
    • https://cdn.sqhk.co/rajunakeb/ghxWcjb/red_button_up_dress_long_sleeve.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/343525.pdfIn PDF document text
    • http://sarkife.site/valkyrie_profile_lenneth_apk_unlimited_moneyegib9.pdfIn PDF document text
    • http://xerudipebij.22web.org/murovimiget.pdfIn PDF document text
    • https://xelixexojiga.weebly.com/uploads/1/3/4/1/134108676/ad712f0.pdfIn PDF document text
    • http://stylecurtains.com/24088820015rsh8.pdfIn PDF document text
    • http://sewonmedix.ru/80992172173tsxjg.pdfIn PDF document text
    • https://rivoliga.weebly.com/uploads/1/3/5/3/135311175/mater_zevim.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/jaresidatajafu-wigarujug.pdfIn PDF document text
    • https://divupitibi.weebly.com/uploads/1/3/4/3/134328085/5150674.pdfIn PDF document text
    • http://heartcenteredequestrian.com/play_free_games_online_without_ing_gtafo6oh.pdfIn PDF document text
    • http://cheapestshop.xyz/administration_interview_questions_template2r09q.pdfIn PDF document text
    • http://apparently-home.com/mowugeruzunujerovitujunortvl7g.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/hcibUgi/jodidami.pdfIn PDF document text
    • https://nunebavakagepas.weebly.com/uploads/1/3/4/4/134446468/674815.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/fhcjiMn/vip_access_symantec_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/kdi6hhc/instrumental_rap_90s_old_school_hip_hop.pdfIn PDF document text
    • http://yoptan.space/fojubemafidokogemok8vt14.pdfIn PDF document text
    • http://daimontimur.org/xepowasafewiratifu6bv4p.pdfIn PDF document text
    • https://xunitaminovo.weebly.com/uploads/1/3/5/3/135349323/6781eb87f457.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://janevowox.epizy.com/22475401187.pdfIn PDF document text
    • http://bubezowi.epizy.com/weratipugenemusabap.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/55339240452.pdfIn PDF document text
    • http://suwotewi.epizy.com/zirapanuvifejijetabipaw.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_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 5564 bytes
SHA-256: dbf5ccc50e0635e50ba2c493035ed0ccbf6ab7fad8a793e71c387e9542319f39
font_01_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 9816 bytes
SHA-256: 49a7dfd56e4587528dc4ad67fd6f24b4cb00a2fcf430cce5392100374af6bacb
font_02_sfnt_off00011b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B43 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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