Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b70e61821cce909…

MALICIOUS

PDF

87.5 KB Created: 2021-03-24 12:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: be96cfc603b3f6e44fb3493152b7143d SHA-1: 6b3624f0795cbd0d0814db63728c1eca0294eeb3 SHA-256: 4b70e61821cce9093e072b62d1ea2a03abeba4e1f19b7cde148076b1edf36199
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL (`https://resalured.ru/wix?keyword=tuxedo+sam+airpod+case`) appearing to be a lure for a specific product. The PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=tuxedo+sam+airpod+case PDF link annotation
    • http://badoxik.scienceontheweb.net/federal_board_biology_book_1st_year_download.pdfIn PDF document text
    • http://noxavikadovul.mypressonline.com/casting_defects_download.pdfIn PDF document text
    • http://reduslim-ordina.site/vulifopifuwipevirab8c4o0.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/27421508204.pdfIn PDF document text
    • http://trysoda.pro/922838357w8h8k.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/wutifalojok.pdfIn PDF document text
    • http://rineset.xyz/54775929493ylbd1.pdfIn PDF document text
    • http://jirafka.space/jessica_jones_episode_guide_season_1ci7oa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajigusis.epizy.com/xuluwulejoxupojo.pdfIn PDF document text
    • https://7ffdda70-5d62-4f0e-9eb1-843e96ef3fab.filesusr.com/ugd/8c5bc8_51a8729f55b04ff5a06bbdb37f3b1103.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d212334a-4b58-4f60-88b9-b205e59588b7/how_to_read_vishnu_sahasranamam.pdfIn PDF document text
    • http://lelisavebak.rf.gd/26467640146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31bbe7e8-ccd5-496d-9449-29c971f41f7a/sarabusinagewesobifit.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/givotapiwujez.pdfIn PDF document text
    • http://nibimasumexugi.rf.gd/13962833580.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_b81eb594cd1549b7a121456a3926cb62.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/the_standard_miami_beach_membership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e4c00a-3c97-48fb-ba85-814232e4de3c/are_marvel_masterpiece_cards_worth_anything.pdfIn PDF document text
    • http://giwigevo.rf.gd/wojebevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9945c4fb-3301-4d52-9739-f49dfcbd4e42/semasogoj.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_off00011718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 5204 bytes
SHA-256: 35706d3b4ed5da7c3875ecb918d12000f77b1edf923552d5ffa6f933a73ddd4a
font_01_sfnt_off000128b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B8 12056 bytes
SHA-256: c16d9f158630fef2e5f8f164b2bf0b6c5f4c181a71d7cea08c175115cf9176d9

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