Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff9d6fe0b5619c9…

MALICIOUS

PDF

79.1 KB Created: 2021-03-24 04:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ba466162ba93f95c12b05f4cd00b58f2 SHA-1: 98c18660024edafe5cdc2886b6ce5c58689e21d9 SHA-256: 4ff9d6fe0b5619c91da2535327b9f8d60919cd7c5759ea4a9b8c9d3cf7a66d11
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to suspicious domains, including one that appears to be a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

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://vilenefex.ru/award?keyword=reframing+richard+bandler+pdf PDF link annotation
    • https://vejewumuwuwaja.weebly.com/uploads/1/3/4/7/134759129/fc19b.pdfIn PDF document text
    • https://kumigovujubexug.weebly.com/uploads/1/3/0/7/130776874/8e5840d4174.pdfIn PDF document text
    • https://vuxukavimegi.weebly.com/uploads/1/3/5/3/135328550/dorizujatuwisasa.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/english_to_sesotho_dictionary_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fcceaab1ea77.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/99397549227.pdfIn PDF document text
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/6139054.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/why_isnt_my_aux_cord_working_in_my_car.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/valuluzugadape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_600ffb8c5c270.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a5d88fd7-e071-404a-a660-a78c7dabc95f/perception_in_tok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5e2b7f-c3bf-4e52-bf85-57fcb7ed12dd/52951036675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7373f4-1e2c-4fc3-b497-4b1369c15e31/the_miracle_morning_nighttime_affirmations.pdfIn PDF document text
    • http://wetozofuzim.epizy.com/how_did_seal_team_6_get_its_name.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/husqvarna_yth24v48_air_filter_replacement.pdfIn PDF document text
    • http://wekiwuja.rf.gd/torugukulilobulup.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/4591721482.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/63189097611.pdfIn PDF document text
    • http://nipinukajuxude.epizy.com/7._snf_sosyal_bilgiler_iletiim_testi.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/over_the_rainbow_songwriter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 5136 bytes
SHA-256: 29a32d1db1e22c5126afff5bf3059d2b41015cdc0b8813b6bf1cded641abb781
font_01_sfnt_off0000f9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 11680 bytes
SHA-256: 16441b43e5755aeab7091896e7aa6e9acf4723821b3445c3224078ac8d240738
font_02_sfnt_off000120be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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