Malicious PDF — malware analysis report

Static analysis result for SHA-256 0743f7a18905ec5a…

MALICIOUS

PDF

76.3 KB Created: 2021-01-20 09:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 32e007bb2fe61fc4454a34b284dbd037 SHA-1: 70c74b730666bdc1a9854bdcc5aa470e7eaee298 SHA-256: 0743f7a18905ec5a0ce47b11f1cd09d5856ccb4fb67a0dcf74c10e9ef4091623
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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
  • 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.
  • 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://traffine.ru/123?utm_term=truth+project+study+guide In PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/128861.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/d4ichhU/raxisisofogidewigefaded.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420451/normal_5fcfea2015f83.pdfIn PDF document text
    • https://cdn.sqhk.co/jimikafede/jeULpXy/concurrent_enrollment_vs_ap.pdfIn PDF document text
    • https://valexipeval.weebly.com/uploads/1/3/0/7/130775413/96ebab628bf.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/200851.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/4813351.pdfIn PDF document text
    • https://site-1174307.mozfiles.com/files/1174307/75840313005.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/memul/86861075579.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/decoder_bcd_7_segmentos_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/fudarelosuzoki.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/69879889682.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/risumap.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/mujovisarikin.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/nolib.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_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 5220 bytes
SHA-256: 2c21938393ecba3fc6617d541a39b148864d309a2135977187c27632f10e98a3
font_01_sfnt_off0000fe29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE29 11312 bytes
SHA-256: 707780f37890587cad273a6837b31c462eaadf187232f197c8a8915662910710

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