Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b0a16bcb5dd35f…

MALICIOUS

PDF

73.2 KB Created: 2021-03-16 01:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6833a7ffa946ad853e3966e8c567e01 SHA-1: b15ad54b0a91e8d00501bc1e5653557a1dac2867 SHA-256: e0b0a16bcb5dd35fa3060d4a106963f1d00f6a1e585a816df6d9f1b106b95770
166 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of an advance-fee scam, specifically mentioning parcel delivery requirements. It embeds multiple URLs, with one prominent URL pointing to a domain associated with malicious activity. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://xezojetit.ru/strik?utm_term=install+hp+laserjet+p2015
    • http://guzoseta.getenjoyment.net/tizuler.pdf
    • https://cdn-cms.f-static.net/uploads/4445104/normal_601b446317a1c.pdf
    • http://loneresel.mygamesonline.org/basalt_fiber.pdf
    • https://cdn-cms.f-static.net/uploads/4424991/normal_6023cf4c26baf.pdf
    • https://static.s123-cdn-static.com/uploads/4369332/normal_60097d72d9b1a.pdf
    • http://rejonanujezeke.22web.org/all_the_kings_horses_song_robert_plant.pdf
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5fdec93b4f539.pdf
    • https://static.s123-cdn-static.com/uploads/4374203/normal_5fcc2a0d48773.pdf
    • http://gadivawiw.sportsontheweb.net/mibomu.pdf
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fda7f805e7f9.pdf
    • https://cdn-cms.f-static.net/uploads/4464532/normal_602acf1f6ed14.pdf
    • http://natezaka.iblogger.org/what_age_group_reads_the_chronicles_of_narnia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_179ef25f60fe4d4ebb2f6cc362ead457.pdf?index=true
    • http://parepakikil.epizy.com/37911589876.pdf
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_6b5681f6f4854a1e8fc9d6345e996d6b.pdf?index=true
    • https://736f3f86-ac4a-4d06-be6b-3320275ea8ee.filesusr.com/ugd/cd27d0_1e501dd9f35240f2bebdefc61c981b96.pdf?index=true
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_4c99218e1ad54cb3a02182c551387deb.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e05e.bin
a380e8b9bfe307b9cbc515703bc979f4d3a00b2573aaf31ab4ff197749a0217e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 5368 bytes
font_01_sfnt_off0000f2a0.bin
d3a63e77e0c5c5053a63238f8f1af56f3e7e5c6af91dcb5c72e2549505125b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 11008 bytes

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