Malicious PDF — malware analysis report

Static analysis result for SHA-256 227422f2bc828728…

MALICIOUS

PDF

70.1 KB Created: 2021-02-23 05:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1a93c3851e3a7c350a5c2f8b85fc159a SHA-1: d782614e9d5e4574375529f4d8120c7a6a66f2cb SHA-256: 227422f2bc828728f4e4a2940bf612833a76ba5d9e453c37443a7466fac648ca
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users 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://bologen.ru/123?utm_term=how+to+work+a+wildgame+camera PDF link annotation
    • https://cdn.sqhk.co/guwaloxipete/hahhheY/red_balloon_meaning_halloween.pdfIn PDF document text
    • https://cdn.sqhk.co/wamitavixitu/fgig4d0/warlords_of_new_york_dlc_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/iGifhfS/29271586473.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/jmhhthg/curvy_punch_3d_mod_apk_download.pdfIn PDF document text
    • https://porujeworor.weebly.com/uploads/1/3/2/8/132814718/zonurog_xovaluzidokom_fewop_runoligavitefa.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/mBjdVgg/tifumadupijuvorinisixuf.pdfIn PDF document text
    • https://jabukilitidaz.weebly.com/uploads/1/3/2/7/132740438/jiwavesukofes_wimalovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedokonox.rf.gd/everson_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/installation_guide_for_ring_doorbell_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/adventure_quest_worlds_blade_of_awe_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/bitdefender_full_free_crack.pdfIn PDF document text
    • http://witegev.epizy.com/53668262969.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/34349389434.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/credit_score_report_india.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/famikeluxizutumosilobit.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_off0000d8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B0 5196 bytes
SHA-256: 439c6f39547ca878a38310ab4c14e79c809b8bff2d33b5a24118856526d37c93
font_01_sfnt_off0000ea59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA59 9860 bytes
SHA-256: 5b0e79fa15d50d0bb6ee556247d752a8a3eed849e6fa9bfe3cf71d4f02a9de47

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