Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ff5f51a8cbd941…

MALICIOUS

PDF

71.4 KB Created: 2021-03-17 02:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2dc7d7d326f7294267e3780dfcf3694b SHA-1: 922b4fd2aa3212841f841f6c7053bda40d635686 SHA-256: e0ff5f51a8cbd94108f3f0dd5fe92491e246cfca6539fb09b72b7c541c5b9bf9
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/123?utm_term=crossfire+philippines+free++for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5fed1bffe1bed.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/xanigiwixebolapudod.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/rpp_biologi_sma_kelas_xii_kurikulum_2020.pdfIn PDF document text
    • http://reduslim-sito.site/drug_calculation_practice_test_nzzondq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_602f8d2770bc4.pdfIn PDF document text
    • http://magazok.top/more_scary_stories_to_tell_in_the_dark_audiobookuxy3l.pdfIn PDF document text
    • https://biposekiz.weebly.com/uploads/1/3/5/3/135349949/gidorefuroxupo_dixubuvatege_piwopafovedu.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/4341601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5fe95ac5c89c3.pdfIn PDF document text
    • http://1xbets-regs.site/how_to_do_hiit_weight_training66lrx.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/aire_d_un_triangle_rectangle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_602d20839fb41.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/5052952678.pdfIn PDF document text
    • http://gta-msk.ru/53760771115o8e3q.pdfIn PDF document text
    • http://goproonly.com/pekoxenl1yt.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/2090363598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459636/normal_603b2aadc879c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/thank_you_maam_short_story_setting.pdfIn PDF document text
    • http://zaxuzut.atwebpages.com/how_to_use_a_quote_for_a_topic_sentence_in_an_analytical_essay.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_off0000d85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85E 4800 bytes
SHA-256: 60685fa981c39e93dd919da06e601e5771667c0820bf28b931da9fce663ed27b
font_01_sfnt_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 12040 bytes
SHA-256: a60a890840b3c416885feac060cc72ce74939ac7c6f4a95782bae9243d6b8e1e

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