Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fd1d81a3f9b2be…

MALICIOUS

PDF

75.6 KB Created: 2021-02-27 00:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4193f0cc0e4954dd37171d6dfc22edb5 SHA-1: f81725f6c9824255fe414cfc49b24c0d13fa12c0 SHA-256: 68fd1d81a3f9b2becd10f0444fa409b861a8fe1df9331316d564ba9371d31189
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://jacksth.ru/123?utm_term=how+do+you+cook+a+pot+roast+in+a+ninja+pressure+cooker PDF link annotation
    • http://bixaxivajujojar.mypressonline.com/xuxusowo.pdfIn PDF document text
    • http://koprovk.xyz/velebirifutegotasomadzgrx.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/gomiwesebegezijudewum.pdfIn PDF document text
    • https://naratejog.weebly.com/uploads/1/3/2/6/132682615/fc93b1d77ecdc.pdfIn PDF document text
    • http://xujofalidubof.iblogger.org/renorutalepizubunaviz.pdfIn PDF document text
    • http://balifruit.com/10972694976n81g2.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/de141a.pdfIn PDF document text
    • http://bioforcecolumbia.site/berthold_akzidenz-_grotesk_medium_condensed_freeg6kan.pdfIn PDF document text
    • http://ziwigosopijulal.mygamesonline.org/starting_point_andy_stanley_season_24.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/zafibimutadoti/71672350818.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/angry_birds_2_game_free_apk.pdfIn PDF document text
    • http://diwisowaf.rf.gd/eos_utility_canon_70d.pdfIn PDF document text
    • http://zaxilofekuji.epizy.com/merge_gratuit_en_ligne.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/14787380698.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/guided_meditation_for_relaxation_jason_stephenson.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_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5332 bytes
SHA-256: 15e3451171babca80f812e87570a88be1f5c04027480970af2b578fa619b2734
font_01_sfnt_off0000fbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 11268 bytes
SHA-256: 24d7b1348a7ea7951ddef907dfa5f6251aa79ed9fdf6a12f728d7274197c31bb

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