Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2969511f73e5bc…

MALICIOUS

PDF

74.1 KB Created: 2021-02-27 07:22:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fe47d5d34d739c9061a214360c9e4ed7 SHA-1: a73aefd334b9da6c8a0558d2bfba0ab0c43dde17 SHA-256: 1b2969511f73e5bc67fc756bd07ac735ddbc0612c6ec7e49fd5cdf2f1b03c819
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm or phishing campaign. The primary malicious URL identified is https://resalured.ru/award?keyword=when+can+we+fly+in+shadowlands, which is likely used to deliver a secondary payload or redirect to a phishing page.

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/award?keyword=when+can+we+fly+in+shadowlands PDF link annotation
    • http://nowukusox.mypressonline.com/what_words_describe_a_rainforest.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/dasaje.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/b60a0.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/16979139146.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/64717242431.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/native_american_flute_sheet_music_book.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/5031915.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_to_repair_a_snowblower_carburetor.pdfIn PDF document text
    • http://xinupavob.iblogger.org/rarosiwawitux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dalezogidaxi.epizy.com/bootstrap_template_shopping_cart.pdfIn PDF document text
    • http://zoxelapotojawub.rf.gd/how_to_open_sentry_safe_model_v260.pdfIn PDF document text
    • http://zuvaxideta.rf.gd/digukidowaduzitenoneri.pdfIn PDF document text
    • http://garulolit.rf.gd/mofawosafitixilu.pdfIn PDF document text
    • http://jomozaredid.rf.gd/brothers_in_arms_3_mod_apk.pdfIn PDF document text
    • http://kusinusefi.epizy.com/unprotect_excel_worksheet_software.pdfIn PDF document text
    • http://bidilud.rf.gd/acetato_de_calcio_bula.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_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 5220 bytes
SHA-256: 551bcd107b17736e7d444f26ea15bc2c94d4ddca9bf2529cdad1a458a51d09cd
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 10472 bytes
SHA-256: 5fd0676d5009495094779a41848041826a71628e8582c8e8df850919b8013194

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