Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e3b9876d48a073…

MALICIOUS

PDF

75.9 KB Created: 2021-03-06 13:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 133f8db103b8ac183e32833ad3563222 SHA-1: 5e49b8c658348d14f1322153c6f53042f13576cd SHA-256: d9e3b9876d48a073ed0364d391c5582db3fd07f91b9e452f6e844f0404c824c8
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting, specifically pointing to 'resalured.ru'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=what+we+talk+about+when+we+talk+about+love+short+story+pdf PDF link annotation
    • http://girlsbeach.space/how_to_reset_jawbone_icon20k5z.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/JS1gdhj/rozitimalowupataxowuwabe.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/why_is_economic_interdependence_important.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451368/normal_6005d8428f120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387052/normal_5fc644c80f049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427091/normal_5fc97c1f89688.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/will_there_be_a_season_4_of_under_the_dome.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/bomubogedofuluwofixiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412909/normal_5fe86e59cd800.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/Gy3hgwG/free_gems_coc_real_apk.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/how_to_install_badger_100_garbage_disposalpqad3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tulafixobokov.rf.gd/evinrude_18_hp_fastwin_gear_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d943f7d-7466-4a01-b045-6b936fa9aed2/kindle_instructions_uk.pdfIn PDF document text
    • http://fimageparoxa.rf.gd/embolism_pulmonary_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23851d3b-6c3a-4d90-9d02-fd739bc0fb37/jetaweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04064553-5075-474f-9168-218f3cf5ddee/how_to_teach_in_spain.pdfIn PDF document text
    • http://naxadib.rf.gd/budgeting_spreadsheet_dave_ramsey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc0e3a0b-35d3-443a-86f9-9f369d32c6e6/rebifemogix.pdfIn PDF document text
    • http://gokegufokefewev.rf.gd/dasuk.pdfIn PDF document text
    • http://wikidupuzok.epizy.com/tower_defense_games_android.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_off0000ea53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA53 5600 bytes
SHA-256: 33d88356bc9f832577b391b4968f1c41202b670e2fe2084b96f02ae84ca9be4f
font_01_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 10476 bytes
SHA-256: 077a6e7183742c9f9c06bf661ba54ae9c07084e05e46ea03adb3d2717ad4da89

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