Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e2d3f7044d411b…

MALICIOUS

PDF

74.9 KB Created: 2021-01-01 14:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d86baf8c368ca85d2014f136f1734b61 SHA-1: 724b249971172dc5352e01709a01d5afe5b92e6b SHA-256: 15e2d3f7044d411b3156bd625946b433aa294f12ae56cce8f7a95d27d26ef213
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The document body, though obfuscated, suggests a lure related to '5 seconds of summer band members', likely intended to trick users into clicking on the numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafficel.ru/strik?utm_term=5+seconds+of+summer+band+members PDF link annotation
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/fasaxotizenugop.pdfIn PDF document text
    • https://tugarekuxu.weebly.com/uploads/1/3/4/3/134307697/muwaloxevej.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/dc0091fb593.pdfIn PDF document text
    • https://kedigijolaga.weebly.com/uploads/1/3/4/3/134331451/pafutos_wijapipurovifo.pdfIn PDF document text
    • https://kirugivedipabaw.weebly.com/uploads/1/3/4/4/134464293/wuwowokakig.pdfIn PDF document text
    • https://niridugur.weebly.com/uploads/1/3/5/2/135296669/zanavigogek-kogum-wojekox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461746/normal_5fdf821f93630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383445/normal_5fcce907bac5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/fanozevonilusejudemifi.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/92595715786.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/ibuypower_pc_bb970.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/jovadupudepemitajulej.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/legavakujupulewevezixigam.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_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 5304 bytes
SHA-256: 630b7b6423219855266f3467eca365d513cc02bef79e4f721bad8ba568cfad68
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 10372 bytes
SHA-256: 49456ba6199fed8732ff5d4dac5c309effff0bb267bdd9309909601a1a60387c

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