Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e43e762e9dca4be…

MALICIOUS

PDF

119.8 KB Created: 2021-05-12 01:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c487e67552a99b88addca07f351df17 SHA-1: 17b903ec78d2e529deb58b691c223971b0f2e7c3 SHA-256: 2e43e762e9dca4bec293c570327150ee283b85487e564d1536cd12276b5b0b54
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/strik?utm_term=how+to+solve+a+rubik%2527s+cube+step+by+step+wired PDF link annotation
    • http://kyhni.site/descargar_vyprvpn_apk_modvx57v.pdfIn PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/6422934.pdfIn PDF document text
    • http://ontrade.top/28196556941ksd9a.pdfIn PDF document text
    • http://senteber.site/capacitor_working_principlere1sj.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ik1i6mC/tomazawebiku.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/h5hbtn1/96035021604.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/6787551.pdfIn PDF document text
    • https://cdn.sqhk.co/zurajekiviw/idj0if7/top_tags_for_likes_for_instagram_app_download.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/julexekubaj/tunidumalerozedo.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/91135261362.pdfIn PDF document text
    • http://xubaforan.epizy.com/health_and_safety_training_companies_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/game_capsa_susun_offline_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/swiffer_wetjet_refill_pads.pdfIn PDF document text
    • http://tapimezekuboj.rf.gd/bixibimosonuzamudatami.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/nc_dmv_practice_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/81514655541.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/27548294297.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_off00019319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19319 5520 bytes
SHA-256: 45f3e0785110fba7317f55dbae2b0ab95b62643c0a0255ce7647022b79265de3
font_01_sfnt_off0001a60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A60A 12208 bytes
SHA-256: 4896f3ad6f1376a89a8c6706a409209d7c5d6e2c496ce752abdadf4ecdaf476d

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