Malicious PDF — malware analysis report

Static analysis result for SHA-256 378e9023301f4b44…

MALICIOUS

PDF

83.0 KB Created: 2021-03-16 23:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f3d2355cc9eeaacaca216582b01424c2 SHA-1: 58bbcff06b420a602250a32e0673e405e2909ea2 SHA-256: 378e9023301f4b446bea5730f37a5c2c3ecda888a203fdb358d204694a89deb8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains keywords related to translation, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=english+to+farsi+translation+in+english+letters PDF link annotation
    • http://evgeniy-semenenko.ru/el_caballero_dela_armadura_oxidada_capitulo_3_resumen_cortoh2qv9.pdfIn PDF document text
    • https://tezijetukiresu.weebly.com/uploads/1/3/5/3/135394197/parozive.pdfIn PDF document text
    • http://blognews.top/tijuzajuweboxegetazorakabyz13l.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/AicieVY/pixel_world_hack_download.pdfIn PDF document text
    • https://sigalositas.weebly.com/uploads/1/3/4/6/134618276/58f78b.pdfIn PDF document text
    • http://dorightschool.com/incites_journal_citation_reports_fecyt08bnd.pdfIn PDF document text
    • https://sojebubibofanex.weebly.com/uploads/1/3/4/5/134512436/bumovimupaj.pdfIn PDF document text
    • http://pokupka.space/57629350790h6j9v.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/80526165587edpwk.pdfIn PDF document text
    • http://summ-ita.space/spasticity_scaleixlr0.pdfIn PDF document text
    • https://pofekivivefuron.weebly.com/uploads/1/3/5/3/135339802/9679919.pdfIn PDF document text
    • http://prequester.online/45939443398496ap.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/hi09hdr/65822433308.pdfIn PDF document text
    • http://cherrypimp.online/when_to_remove_infant_insert_graco_click_connect2rpmz.pdfIn PDF document text
    • https://nikigetevakawu.weebly.com/uploads/1/3/1/4/131413362/pilam.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/laginekux/draeger_gas_vision.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/comparison_chart_template_canva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c11f0b8-ea30-487f-9bf2-0a8454b9dfbc/83408950952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/641bf358-c5ba-4652-9e96-cac60dcec379/4167047020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c652001-1dab-4713-9fc1-3e1d63de26e0/35793190769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5d8b85-d918-475a-9b4d-fe1dc639b0d0/how_to_become_a_referee_for_soccer.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_off0000fa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 4772 bytes
SHA-256: 4a826b60b1dd71e5f4f38b604398175dd9bcb5ca3df33a25d541b58932ab0e34
font_01_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 11260 bytes
SHA-256: f0a906309a5e235e8c5cb9b433a09b5944c17835fcd3e21472d008ebfa3f0bda
font_02_sfnt_off00013009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13009 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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