Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b7840eda85e7e0…

MALICIOUS

PDF

78.3 KB Created: 2021-02-21 07:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c430c3360a620b3a13b20bcba8a99513 SHA-1: ada6f3d3eb495f2f5efeec1209ab1b07d6aae930 SHA-256: e4b7840eda85e7e0052ad55fd87b0c6913e98ef7342674761abdee6e934bf225
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

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://baarspo.ru/wix?keyword=square+roots+and+cube+roots+worksheet+kuta PDF link annotation
    • http://werenntaq.online/vanguard_imaginary_gift_templatedhn2k.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/kuponuwudorovasepalo.pdfIn PDF document text
    • http://espacecmb.xyz/bodmas_in_hinditzciq.pdfIn PDF document text
    • http://wiinorama.space/warwick_paris_former_hotel_warwick_champs-_elyseesskjdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_601735f14b268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_600542c4a2b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_602a828f3c640.pdfIn PDF document text
    • http://amaryllis.space/3750265658353iy0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481847/normal_5fe2aa3ca07b1.pdfIn PDF document text
    • http://am-sound.ru/83611216012bcwti.pdfIn PDF document text
    • http://thiswaytovogue.com/building_construction_atul_prakashangy84a.pdfIn PDF document text
    • http://heartcenteredequestrian.com/md_medical_group_investments_plc_annual_reportt3oww.pdfIn PDF document text
    • https://sojofemek.weebly.com/uploads/1/3/4/3/134310133/fe0d5647.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/dixamow.pdfIn PDF document text
    • http://trickyturkey.com/national_general_insurance_online_quotez9uvj.pdfIn PDF document text
    • http://pupijepu.22web.org/ethical_hacking_tools_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temefolix.epizy.com/12239979170.pdfIn PDF document text
    • http://vulemeke.rf.gd/airodump_ng_ubuntu.pdfIn PDF document text
    • http://vutakeba.epizy.com/affinity_photo_for_ipad_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 5520 bytes
SHA-256: e09db685b18e2093519d6f0cc80e3787fee7221a6b00686bba4cc4a176554a02
font_01_sfnt_off0000ec92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC92 10096 bytes
SHA-256: c7109af8f7cb8a4bc4a8cafe8f3e4698b08dd75ff4ff1da2e7306534d638c8bd
font_02_sfnt_off00010f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 17704 bytes
SHA-256: 7b76c58d2be3db580646c6dc81b8682707252194eeff36458cbd532890037d63

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