Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5e247b2e17ccf1…

MALICIOUS

PDF

75.9 KB Created: 2021-03-12 10:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a926f295aa3d80a26e0c401cab2a25 SHA-1: e3872449e47310e5b7a4adccdfe8fdab233d5f68 SHA-256: 4d5e247b2e17ccf192f991e6e1ff8be3197eb3a4bf30528d125b7fddb1ae1b45
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as an advance-fee scam lure. It contains numerous external links, many hosted on disposable domains, directing users to potential phishing or malware sites. The document's content, though heavily obfuscated, appears to be a lure related to an "lg remote app", likely to entice users to click through to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://seumenha.ru/strik?utm_term=what+is+the+lg+remote+app
    • https://napuvenorabinu.weebly.com/uploads/1/3/4/4/134490891/8401211.pdf
    • https://metuwudoguwo.weebly.com/uploads/1/3/5/3/135323448/1228535.pdf
    • http://xadikefivo.iblogger.org/ginoxoguwuxutujemu.pdf
    • https://puranezujifa.weebly.com/uploads/1/3/4/5/134582728/15de6154fef03.pdf
    • http://new-leggins.site/79132713462slkw8.pdf
    • https://xebejadeveroj.weebly.com/uploads/1/3/0/9/130969735/lagex.pdf
    • http://vidapabil.22web.org/97673737484.pdf
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/lajamozo-soxow-fovikag.pdf
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/wusaravifaxot.pdf
    • https://kofosobi.weebly.com/uploads/1/3/4/5/134528260/lasedirijaduvezotoz.pdf
    • http://italysummer.fun/can_dogs_eat_clementine2c2g5.pdf
    • https://lozepexowazabi.weebly.com/uploads/1/3/1/4/131409761/31f62d31d0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xupebina.epizy.com/kuzakifosawanemumopod.pdf
    • http://varogofef.epizy.com/55099719914.pdf
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_302c7d77965c40cda7ad0946e9d607f9.pdf?index=true
    • http://latuwukatagowa.epizy.com/how_to_configure_motorola_sbg6580.pdf
    • http://megutid.epizy.com/buwom.pdf
    • http://regujivabi.rf.gd/kuxipip.pdf
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_577838dbec5c483dbb29c7c065199a3f.pdf?index=true
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_ea0eac2805424cff87bdc6d642ea999a.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_off0000ec36.bin
a8f9beaf6c1d2af2194329672bb2c3b39706d41ebf4d694c82498b72d8601a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 5248 bytes
font_01_sfnt_off0000fdec.bin
3cf031ce6676da2da3b140dc2ea1300cfe377a3517c8e655177eb9063162a495		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEC 10684 bytes

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