Malicious PDF — malware analysis report

Static analysis result for SHA-256 380c663de62085ee…

MALICIOUS

PDF

76.2 KB Created: 2021-03-22 21:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7cdb3ce2cfa2827ad7b84ea198026de9 SHA-1: d2fefce7eb3fe051b390d27ae87556a38b4a27f9 SHA-256: 380c663de62085ee6a87f77ad327c7ee4bacc7a20fbedb09e31443c51518886e
184 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to downloading drivers. The ML classifier and ClamAV detection further support its malicious nature. The primary attack vector appears to be a phishing attempt via a malicious attachment.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=download+driver+hp+laserjet+1320+for+windows+10+64+bit In PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/hePjeeC/69246358421.pdfIn PDF document text
    • http://teguruta.medianewsonline.com/revolutionary_armed_struggle.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/wilum.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/couperin_tic_toc_choc.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/ysoajbW/mibalevomunev.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/reverse_image_search_facebook_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/eifaNkq/noruniji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mopezuvo.epizy.com/44714707564.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/audiolibro_amar_o_depender_walter_riso_descargar.pdfIn PDF document text
    • http://desakoda.rf.gd/dusijuzatanebepexoli.pdfIn PDF document text
    • http://rafodize.rf.gd/bapolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8225a3-1372-4714-8d12-4e78d1c95505/78597152097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548d3ad8-020b-41e6-8c0a-e9f5d87d95c4/what_is_a_sentence_openers.pdfIn PDF document text
    • http://fodiwivovekuvut.epizy.com/pitogiges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde2bbe0-2474-4b0e-9bf9-798861db401c/can_you_keep_a_secret_barbie_movie.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/raritegojesifulirabapajuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef61e809-9c8b-43bb-a99d-11f34a4a3828/68799800052.pdfIn PDF document text
    • http://dukojalili.rf.gd/xomununuvij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889e80ca-8921-4815-b10f-16e164c2a989/nopepupeki.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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 6228 bytes
SHA-256: 6ca4158ee826b00cf2147529ba3a542eb4e17a91030bf072140ca3264163cf01
font_01_sfnt_off0000fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 10328 bytes
SHA-256: 08df9a68da5684f7ee42967acd6fcd6dfb7eac139cc7bb785b912c729d1248b8

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