Malicious PDF — malware analysis report

Static analysis result for SHA-256 c330d488ea124a0d…

MALICIOUS

PDF

89.8 KB Created: 2021-03-13 23:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 884020c4a17fe142fce241917fa0c44b SHA-1: a220060933aeadc1dbf1cf4a3d0f1d313f5a47f0 SHA-256: c330d488ea124a0dd0cf8dc6b9f59075a9527d478c2cb97eab3b18c339455318
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a phishing lure, including a fake download button and a password-protected archive pretext. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=canon+i+90+driver PDF link annotation
    • http://ketosimple.online/sirowugojuxoda1479f.pdfIn PDF document text
    • http://putoseba.iblogger.org/roland_fa_06_user_reviews.pdfIn PDF document text
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/8933530.pdfIn PDF document text
    • https://karinavoru.weebly.com/uploads/1/3/4/0/134017817/pirezunuredaro.pdfIn PDF document text
    • https://xavitutasufeja.weebly.com/uploads/1/3/4/6/134669981/286d83de.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/62f5d8a2c91ca.pdfIn PDF document text
    • http://bestita.space/e_scooter_repair_shop_near_mezrpon.pdfIn PDF document text
    • http://golden-charm.ru/lasepujaxaruvp6z8f.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/jaxikizizuwodes_biduwu_vexap_xepunepisukopad.pdfIn PDF document text
    • http://repair-kompov.ru/subtraction_word_problems_worksheet_grade_1moa7i.pdfIn PDF document text
    • https://jelezasi.weebly.com/uploads/1/3/5/3/135347821/wevigabonoregel.pdfIn PDF document text
    • https://dovilukimiju.weebly.com/uploads/1/3/0/7/130776072/6e55ea676f.pdfIn PDF document text
    • http://mxbur.fun/el_sueo_de_una_noche_de_verano_william_shakespeare7qnyi.pdfIn PDF document text
    • http://superheatbelt.xyz/rt-n66u_password_usernameskhr7.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/busobinij.pdfIn PDF document text
    • https://wabuxopimigom.weebly.com/uploads/1/3/4/0/134042903/9156903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_e23029c0013d46d994f332b7f392b3b3.pdf?index=trueIn PDF document text
    • http://sebiwafexudezo.rf.gd/36578341368.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_a6ccd71ab8514ff5907efddbf94678d5.pdf?index=trueIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_b7988e5be0c04d7aaf9ac1bd28b224cf.pdf?index=trueIn PDF document text
    • https://c750c8cf-f189-4014-a78e-197d4cb0f9f2.filesusr.com/ugd/e5a943_e17b35f1114846a785316d9c698f2117.pdf?index=trueIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_013392d1f8464e638d587e763005c5b2.pdf?index=trueIn 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_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 4872 bytes
SHA-256: 24ebb84379403fd5032ed4537955361282f22b8dc6a301eee5ff4b977a3e9440
font_01_sfnt_off0001312e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1312E 12660 bytes
SHA-256: 883080ccabbe00e778bdb65bd5bb963435c7d01a300434afcc81b8920779c0d2