Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4217e1f54f29fef…

MALICIOUS

PDF

75.8 KB Created: 2021-03-31 20:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2cd347aa2fa8e024a78c6e1bbd95be3a SHA-1: 7753e0fda191457629b5e1a2b899028c157a2d2a SHA-256: f4217e1f54f29fef6a3f787523adbe14ac5aad8544797b2383d1e67aa902456c
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. The presence of multiple external URIs, including one on a disposable hosting domain with UTM parameters, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to car maintenance, likely serving as a lure to encourage clicks on the malicious URLs.

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/strik?utm_term=e46+gearbox+oil+leak PDF link annotation
    • http://nupewijanetari.medianewsonline.com/magic_bullet_walmart_canada.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/brokeback_mountain_libro_espaol.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/sword_art_online_episodes_order.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/39447958086.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/cerebrosidos_funcion.pdfIn PDF document text
    • http://mebelrostov.ru/91095245539m2joj.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/visual_basic_reserved_words_list.pdfIn PDF document text
    • http://comp-arenda.site/hp_deskjet_2620_price_in_nigeria4bd5s.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/65955854877.pdfIn PDF document text
    • http://lesantyqas.online/944704936790sk0o.pdfIn PDF document text
    • http://nuxidokugaleme.iblogger.org/jimukibudalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pewavifasovifuz.epizy.com/how_to_use_blender_to_make_2d_animation.pdfIn PDF document text
    • https://c3bb11cb-ba02-405d-8462-2b4421b436e1.filesusr.com/ugd/4c7814_fc20d60f4ea740089060229251f8821f.pdf?index=trueIn PDF document text
    • https://b23ebcb4-2e41-4c68-a408-584c84124782.filesusr.com/ugd/5a2446_b0e08ed1620b4549819c3db082120753.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_5519e50b8af747e2aa9f9cc475663e5f.pdf?index=trueIn PDF document text
    • https://d12d056d-c16f-42d2-bb36-b12dbd13f8e5.filesusr.com/ugd/a2005d_a48e3f0a211f4641b7df30a87744ff72.pdf?index=trueIn PDF document text
    • http://kixomeremit.epizy.com/eager_beaver_chainsaw_parts_list.pdfIn PDF document text
    • http://josuxak.atwebpages.com/les_miserables_medley_piano_sheet_music.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/asciidoctor_theme_fonts.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5144 bytes
SHA-256: 10428b803dc54be15f023ee8d8de60d17bcc2380babaf51ebad93a33c82218f8
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 11316 bytes
SHA-256: cc86a01ec033a502c260ea9028d3cfe14bf0c66b1ff149f8fa7e24f7bf0b6147

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