Malicious PDF — malware analysis report

Static analysis result for SHA-256 49518e7afd997072…

MALICIOUS

PDF

68.4 KB Created: 2021-02-23 00:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 32f13ac920dff16fd80e965c8232a804 SHA-1: 77749120cad0f89ad32c704c9ecc78999af3411f SHA-256: 49518e7afd9970724257d7a03bcb446545e37a8cf6fd9a86ddf72ff147ac98e1
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 or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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 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://baarspo.ru/wix?keyword=2017+polaris+rzr+1000+owners+manual PDF link annotation
    • http://lirelejavebot.iblogger.org/87578614326.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/how_to_tune_up_a_riello_burnerssps4.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/fqa9qPu/heart_shape_tree_clipart_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zeragekub/ifijfgc/70359530758.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/dghZjcc/6573991665.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/pizegiwuzizaxal-sugimidejiboga-vukip-vapinor.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/iqCMjjA/89742874119.pdfIn PDF document text
    • http://diniwesavaku.iblogger.org/microsoft_excel_viewer_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/4gdWicz/mupafefopotodijo.pdfIn PDF document text
    • http://lesanuzununefa.22web.org/amaurosis_de_leber.pdfIn PDF document text
    • http://itash.space/warebedetezaxuximr9dzg.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/jghhdha/combined_events_definition_math.pdfIn PDF document text
    • https://cdn.sqhk.co/nerurepaza/hicNhhy/father_son_haircuts.pdfIn PDF document text
    • http://baykamif.space/warner_brothers_studio_tour_guide_jobsm6p82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vegosazozadexe.epizy.com/fafixaba.pdfIn PDF document text
    • http://gesulobanaxa.rf.gd/nugupakimadufunidap.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_off0000cd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD94 5416 bytes
SHA-256: c9e7d209c254e43ff45761fa694e283e539b81f735193c1378d7884513d449aa
font_01_sfnt_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 10740 bytes
SHA-256: f1c4a498c6e0858eb802992d4fab5d574d971c1267a82ae915e8d501c8aa94bb

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