Malicious PDF — malware analysis report

Static analysis result for SHA-256 215111b02130c374…

MALICIOUS

PDF

74.5 KB Created: 2021-04-22 17:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e8fdb0f05dc0d3d9a549e63f30d9080d SHA-1: c98b6a0c07ee8e3dc29d6527eb64bbd50dbe56e0 SHA-256: 215111b02130c3740a181b8189e4638f0385f4d13aa73a5ebe1db710e8a2415f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely attempting to trick users into downloading further payloads or submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+cite+a+book+bluebook+format PDF link annotation
    • https://cdn.sqhk.co/getabemuto/jiem6dA/leather_horse_armor_minecraft_pe_recipe.pdfIn PDF document text
    • http://my-favshopf.online/orbit_sprinkler_controller_installation8knsv.pdfIn PDF document text
    • http://cmb-accueil.com/10228614075zc411.pdfIn PDF document text
    • http://natural-shop.info/munavei45u0.pdfIn PDF document text
    • http://storeplus.pro/loreal_hair_color_extender_instructionssmcdt.pdfIn PDF document text
    • http://7lessons.space/nolegenemewepks9k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449996/normal_6003e984d2f73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485930/normal_5fe534dca5965.pdfIn PDF document text
    • http://urro-hu.com/zomusupamotezewaw8ulkp.pdfIn PDF document text
    • http://dalnoboyi.xyz/how_to_make_a_3d_skin_modelw14bi.pdfIn PDF document text
    • http://medyayazilimtr.com/cas_lp-1000_troubleshooting60pbs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5ff9a77686a32.pdfIn PDF document text
    • http://docita.fun/what_is_average_household_income_in_russiaj4rxa.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/aghthh8/nomuvubedavukovivol.pdfIn PDF document text
    • http://wide-do.top/html_form_requiredcggi9.pdfIn PDF document text
    • http://ujjjrrrrr.space/pigifefatosunozabepr2v0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_6014a37052fa4.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvazilu/ht7hfje/sovolaxakajuroxuxatenis.pdfIn PDF document text
    • http://realwockyc.info/gobifoze06j7h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/adobe_reader_dc_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/been_together_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/gelined.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_off0000e496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 5104 bytes
SHA-256: eea559d7a90a7ae67111a8418ec038674e71dc1cdee401a365017e913ba87318
font_01_sfnt_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 10856 bytes
SHA-256: d6bbb49a81c421ee18d64e37766920c8bfc7e7a02a38067b4992ef532e93b704

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