Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ed4806dcd1f7a6…

MALICIOUS

PDF

84.1 KB Created: 2021-01-23 00:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fe64d384eb4d7f5670b57c5c3bc88c86 SHA-1: e03131fa71d681b1421f180c123d22c5e6f00500 SHA-256: 79ed4806dcd1f7a6b6801f83f8699ef211ffa568679468f83a7caea611fa550a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and a high ML score, indicating malicious intent. The presence of a large number of external links, many pointing to PDF files on Weebly and other domains, suggests a link farm or phishing lure. The heuristic 'SE_SECURITY_BYPASS' indicates the document likely instructs the user to disable security software, a common tactic in phishing and malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to lead the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://jacksth.ru/aws?utm_term=daily+activity+log+forms PDF link annotation
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/6ff6d2.pdfIn PDF document text
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/1720100.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/participial_adjectives_exercises.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/bupapaxikip-zusururawalilo.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/c64bd87e29856.pdfIn PDF document text
    • https://jetakazam.weebly.com/uploads/1/3/2/8/132814031/puxubojajature.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/4882172.pdfIn PDF document text
    • https://pabotori.weebly.com/uploads/1/3/1/0/131070723/c546ed6b70b.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/797eb10eea9d7.pdfIn PDF document text
    • https://jokunotewe.weebly.com/uploads/1/3/5/3/135314966/89ff73a99ab.pdfIn PDF document text
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/2bb3cf.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/3139895.pdfIn PDF document text
    • https://befufagu.weebly.com/uploads/1/3/1/3/131384284/4222842.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/tibanepoxilibud/rental_agreement_format_in_tamil.pdfIn PDF document text
    • http://bajipodi.epizy.com/kijemu.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/gawivedaropefebur.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/truman_lake_bucksaw_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/wallpaper_pubg_mobile_hd_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/akhiyan_nu_akhiyan_rab_jane_ringtone.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_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 4928 bytes
SHA-256: 263a2419bd4d26dd47b86e0d564a4a891a1e2038e92d39524d3963f59204eb04
font_01_sfnt_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 10412 bytes
SHA-256: 4c8b0225357d6b9f0647405e47db660182e075b14bff1eca279cb55d54eeb1ad
font_02_sfnt_off000134f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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