Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec70c7848be139b9…

MALICIOUS

PDF

85.2 KB Created: 2021-04-24 21:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b2d938f126c297b2110f5d495f50d7f7 SHA-1: efd646057c6c1363f4ccd735ac48b101349d1395 SHA-256: ec70c7848be139b9ce3cc6b84ddbbabb57e25fec968af82b308e6682f64ff201
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to suspicious domains, and the ML classifier strongly flagged it as malicious. The document body, though heavily obfuscated, suggests a lure related to resetting a remote control, which is a common tactic for phishing or malware distribution. The presence of external URIs and the overall structure indicate an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=how+to+reset+a+ge+universal+remote+control PDF link annotation
    • http://lezobul.medianewsonline.com/45012270375.pdfIn PDF document text
    • http://probmake12.xyz/9034119076burpq.pdfIn PDF document text
    • http://rivafigikiwax.medianewsonline.com/talking_electronics_30_led_projects.pdfIn PDF document text
    • http://lnstagramoriginal.com/time_bound_higher_grade_option_formlaedm.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/bearing_designation_skf.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/4822107.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/5428757.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/4394088.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/13483691820.pdfIn PDF document text
    • http://experiment.website/repolorowalilido69kkc.pdfIn PDF document text
    • https://sufixekanol.weebly.com/uploads/1/3/4/7/134712322/ropixewaxe.pdfIn PDF document text
    • http://wusumomijo.medianewsonline.com/definicion_de_actitud_segun_la_psicologia.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://s3.amazonaws.com/meludav/guidelines_central_venous_access.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_46aa6d2b8e904e108aecfe002f478ada.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figugipopar/vegemurexapupon.pdfIn PDF document text
    • http://noxumalog.onlinewebshop.net/madagascar_hissing_cockroach_care.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_02c41a58b5ed4dfaaca6c119cb3d5f14.pdf?index=trueIn PDF document text
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_0ba1d9e14fd546dcbb4e2a4ec00b445d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/integrated_reporting_simple_meaning.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_956a9d00fd7e4cabb997e9168f7b97fc.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_abb06cc8d77f43b89aa0dbf531783f89.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/lujulewujox.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_off00010173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10173 5116 bytes
SHA-256: a3049afcad117b6ecf57b4a8c438c37e3e63c298b805c006397676519a4d4aec
font_01_sfnt_off000112d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D6 11216 bytes
SHA-256: 8b0dbc84ebcab7a6b5bd232a1c2074a487bef2bf77e70d124692462ce21b883d
font_02_sfnt_off0001394a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1394A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3