Malicious PDF — malware analysis report

Static analysis result for SHA-256 5158b197afdfeac2…

MALICIOUS

PDF

79.0 KB Created: 2021-02-25 04:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f24cb0471debada1a18cada22659bccc SHA-1: b066e08af4491576cacd75533a0fe012adefd0df SHA-256: 5158b197afdfeac24aec34cbf844878f642415036764f3d1d2d0ea6380adae6b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple external URIs and is flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains text related to a "clash of clans ultimate gems hack download", indicating a phishing or scam lure. The presence of numerous links to disposable domains further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wix?keyword=clash+of+clans+ultimate+gems+hack+download PDF link annotation
    • http://taforojujutusig.mygamesonline.org/algebra_de_baldor_ejercicio_98_pag_161.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/43444150781.pdfIn PDF document text
    • http://rastet-malysh.ru/xajidimoremuvoxukexady5gv.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/7410728467.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/revexeku.pdfIn PDF document text
    • https://cdn.sqhk.co/gepatunasux/igFNRm2/30934765602.pdfIn PDF document text
    • http://xsale.trade/fogidebuxekafarulo4xvo.pdfIn PDF document text
    • http://arendaavto.taxi/koxavazokuvatapejakitafixvitor.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/ahhbkzP/xifomilekuzofirabak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevesijuduma.atwebpages.com/61318496005.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/what_does_wounded_healer_mean.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/mumazowekulox.pdfIn PDF document text
    • http://monepakixotimap.rf.gd/customer_relationship_management_strategy_template.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_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 5400 bytes
SHA-256: b84d32523b43cc4d85745b2b3a17d16c750d520d3f8958916046e9214dd11f69
font_01_sfnt_off00010254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 10368 bytes
SHA-256: 36d96c8da5fa4bf3ab47d09c8c809fd7cd249093b4728c37f9562d68ccbf7724