Malicious PDF — malware analysis report

Static analysis result for SHA-256 79feb990ea8d36e2…

MALICIOUS

PDF

77.8 KB Created: 2021-05-12 02:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 719ffc730d93665c5708826951fba3c3 SHA-1: 26169dbf00faf9c4d63c417bf68d043397eda12f SHA-256: 79feb990ea8d36e2993c9d6c41f20a70019c494c8e2f841876e27a68cbdc2f35
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm or SEO manipulation scheme. One of the primary URLs, 'https://dugedepap.ru/strik?utm_term=what+to+wear+to+a+civil+ceremony', is likely a phishing lure or a redirect 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
  • 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://dugedepap.ru/strik?utm_term=what+to+wear+to+a+civil+ceremony PDF link annotation
    • http://fofunido.iblogger.org/97278386967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_6049e737e5ec7.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/musakog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_603ede3e96c75.pdfIn PDF document text
    • https://zebaraxofalolal.weebly.com/uploads/1/3/0/8/130813897/ropufox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jodonurinifos.epizy.com/the_odyssey_book_9_summary_shmoop.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/writing_a_news_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/troy_bilt_mustang_rzt_50_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532173d7-7d71-4e4b-b971-86da51eee590/minuet_2_suzuki_violin_book_1_piano_accompaniment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27d9d65-58cd-455f-ba93-f61e3d72bc70/76624654447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb31b83-769d-49a1-91bd-8cd9180951e7/rozej.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/72823544718.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/pekajopunurur.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/lord_i_need_your_touch_lyrics.pdfIn PDF document text
    • http://vavubal.epizy.com/33583672849.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/niwolitubi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/54403392398.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/jewowobabomukoxirizabegu.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_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 5128 bytes
SHA-256: a1b76a55f1bf806632a6776eac3ca04959f14d1d0b9b287c2ff2bdccc1a3e47c
font_01_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 11932 bytes
SHA-256: 9becb0439ddd9c0b48c3b9c1d029e3f42763098d526766343638654c42208c65

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