Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7db383c59f8f7aa…

MALICIOUS

PDF

74.7 KB Created: 2021-02-17 21:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b95deba26913c134f22ee6c0d4ead69 SHA-1: 600b9b21944458fb72808ec1e54eeab8621a8890 SHA-256: d7db383c59f8f7aa4f9e0432cc62c0f4e3ae2bba7872c9556a76826ba793f41a
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 0.9997

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://crophysi.ru/strik?utm_term=the+rules+of+attraction+2002+movie+download PDF link annotation
    • http://popularchoice.space/juzoboraxakubi1kaa5.pdfIn PDF document text
    • https://cdn.sqhk.co/nerutadege/igGyhf2/football_soccer_star.pdfIn PDF document text
    • http://monubaz.iblogger.org/face_app_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/jhibahf/lenuvize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_602928281b97a.pdfIn PDF document text
    • http://effektzhizni.ru/57509054578v7e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_6025db43150b3.pdfIn PDF document text
    • https://cdn.sqhk.co/pazibafax/TgdiC1q/crunchyroll_naruto_shippuden_129.pdfIn PDF document text
    • http://thedefenseforge.com/cch_ti_file_b_kha7nd50.pdfIn PDF document text
    • http://fruit-ital.space/8558953594288cqf.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/4141984.pdfIn PDF document text
    • http://pedron.fun/9499548019289ybj.pdfIn PDF document text
    • http://wiinorama.fun/drug_induced_xerostomiatw5n6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5ffba76cc9179.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459630/normal_6002c3121064c.pdfIn PDF document text
    • http://genoray.pro/1379499475tpfv6.pdfIn PDF document text
    • https://miniroworopan.weebly.com/uploads/1/3/4/4/134444940/184410ee3a9b.pdfIn PDF document text
    • http://ukranews.icu/matowujuvisejapuviwixpx5ya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tukudapig.epizy.com/set_top_box_application_form.pdfIn PDF document text
    • http://zexeborora.rf.gd/thyroid_nodules_ultrasound.pdfIn PDF document text
    • http://loreforozupole.epizy.com/piramide_alimenticia_para_nios_de_primaria.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_off0000e6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 5636 bytes
SHA-256: 13992e8f60125b0c2c25c64fb57f805233cce0dd5e4f9940a7f33731788dc6ed
font_01_sfnt_off0000f9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BA 10508 bytes
SHA-256: 097234ec809ee370b1576909207a27e3ff190177d1091a7489e035fa36469093

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