Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3171193a3624879…

MALICIOUS

PDF

130.5 KB Created: 2021-03-02 16:35:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 762809a4c025a114a1bbc9fec81dad06 SHA-1: 1037f5bad6f371b9e02dab5ac2d7ba5af2681638 SHA-256: d3171193a36248792e3ffb4dd4bd5df35769073eff75b345e35ca12c6040ef33
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/123?utm_term=los+crimenes+de+la+calle+morgue+resumen+wikipedia PDF link annotation
    • http://bekunogoxabune.iblogger.org/cost_analysis_report_tcode_in_sap.pdfIn PDF document text
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/kiwot-jovizavobirog-siriw-mirile.pdfIn PDF document text
    • https://bugojexipu.weebly.com/uploads/1/3/1/3/131398417/6142b9df69.pdfIn PDF document text
    • https://nupuwuzom.weebly.com/uploads/1/3/1/4/131438231/5129457.pdfIn PDF document text
    • https://xudapugi.weebly.com/uploads/1/3/4/7/134702609/35c4a344b44.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/png_text_hd_transparent.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_60174c60da2da.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/55752223208.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/19248816878.pdfIn PDF document text
    • http://numulul.mygamesonline.org/74879386766.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/14400348047.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/77397221222.pdfIn PDF document text
    • https://perikoweb.weebly.com/uploads/1/3/5/2/135297066/kikiror.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/how_to_pronounce_gita.pdfIn PDF document text
    • https://volasetabis.weebly.com/uploads/1/3/4/8/134879514/tirulinalasi-xosem-karijijuxaxuw-bufujimaxibesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejinivak.rf.gd/xejiwikadonasidebebu.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/which_garmin_handheld_gps_is_best.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/76056534348.pdfIn PDF document text
    • http://poruworetizilu.epizy.com/sample_affidavit_form_philippines.pdfIn PDF document text
    • http://lekekavom.epizy.com/87710425530.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_off0001c0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0B6 5488 bytes
SHA-256: be4e016a13878dcf371b7e71cc758649d3a125984855a7b64df0f5e247479c25
font_01_sfnt_off0001d362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D362 12128 bytes
SHA-256: cb634ac928ab296f7bbeb11706fe84f94fee91e64671a407c00dbeb7d9bdec2e

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