Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5c3c7c4ec1abd0…

MALICIOUS

PDF

84.8 KB Created: 2021-01-31 17:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 59bb8a3eeeb171e65c164f3111412366 SHA-1: 712cc0e4cf4c62ae853f6519dd36bed96bbdf044 SHA-256: ea5c3c7c4ec1abd03e94c4467a8bd72a8e1422364c0748fea9a657926a8b3480
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, directing users to potentially malicious websites. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm the malicious nature of the file, classifying it as a phishing trojan. The embedded URLs and the document body text suggest a lure to download further malicious content or engage in phishing activities.

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://jottigo.ru/123?utm_term=matoaca+high+school+news PDF link annotation
    • https://cdn.sqhk.co/dixufeja/iisB3Da/33657493682.pdfIn PDF document text
    • http://idealica-italiauficiale.website/290384299734ga68.pdfIn PDF document text
    • http://ingmijn.com/93111257744vrmdm.pdfIn PDF document text
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/ca22d65.pdfIn PDF document text
    • http://lighttravel-ng.com/honda_amaze_2018_cng_reviewpbwap.pdfIn PDF document text
    • https://ratilobavet.weebly.com/uploads/1/3/1/8/131858747/2046385.pdfIn PDF document text
    • http://insitemonitoring.com/zorixofawuduvutexuzegwnf0.pdfIn PDF document text
    • https://kuxivudu.weebly.com/uploads/1/3/0/8/130813582/b6c586b755768.pdfIn PDF document text
    • https://rajotabew.weebly.com/uploads/1/3/4/3/134360909/lumudigojugaxomate.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/kesumasaka/pufagixo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/bellini_digital_air_fryer_btdf950_manual.pdfIn PDF document text
    • http://rokalugafujat.rf.gd/fatadudoxubuxijirerop.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/74199268209.pdfIn PDF document text
    • http://zuwarikufaz.epizy.com/5th_grade_nys_ela_test_prep_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/acura_rlx_2014_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/tinelof.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_off00010f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7F 5060 bytes
SHA-256: e2f6376d1074e467e31d66c5e1596943a88d439800092374640bfa524eeebd51
font_01_sfnt_off000120d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 11076 bytes
SHA-256: 26f29040fc85f02bef745388c5e648de926eb65cf405b7bc86d6bb49fe134361

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