Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e843203bff4c45e…

MALICIOUS

PDF

111.4 KB Created: 2021-02-19 05:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 55e295e0eb0755e6a1c96fadc29fc8bf SHA-1: 894bb688692222f7bbe3663fe33742cf9e8a6f20 SHA-256: 2e843203bff4c45e16460407e4e28785957627f037083f5f1d6f33220101b885
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://druttle.ru/strik?utm_term=how+to+become+forklift+operator PDF link annotation
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/zuwejunopokusawevij.pdfIn PDF document text
    • http://pidukefap.22web.org/nunexixekawakuwepovefinu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fe0d85ace8f9.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/lugovowaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501484/normal_5fe6e0ae8ac90.pdfIn PDF document text
    • http://teachost.com/seperiporixelosexiaipyb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_6010c817b8118.pdfIn PDF document text
    • http://1s.london/nomusuvutufigajawidetu7dt7x.pdfIn PDF document text
    • http://nakanilo.club/ideas_for_bridal_shower_sheet_cakes5galt.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/what_song_is_george_costanza_answering_machinebcfdb.pdfIn PDF document text
    • http://modernstyle.pro/39840239514srf6j.pdfIn PDF document text
    • http://pivogafude.22web.org/wobabunowoxupemodowobog.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/2605506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_600e7e1a1e3ea.pdfIn PDF document text
    • https://gogalafubixuvu.weebly.com/uploads/1/3/4/6/134642314/3552881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gowuzabe.epizy.com/vaxaxedowitevifedexawi.pdfIn PDF document text
    • http://tefinavi.epizy.com/50591096057.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/98046558789.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/34605291459.pdfIn PDF document text
    • http://dekutob.epizy.com/gmat_official_guide_2019_google_drive.pdfIn PDF document text
    • http://salalew.epizy.com/pozefonumuturuziv.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_off000177c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C4 5240 bytes
SHA-256: da413a587daae3b33166cf117a152a8b7e8110e2a355e6d195a0f50027be3d24
font_01_sfnt_off00018992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18992 11428 bytes
SHA-256: 500c1eeccb04929c9b4b1a29e566c9353fcca3ff914eb0ff461f375105eecbb0

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