Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8fd678d4119a2f…

MALICIOUS

PDF

83.0 KB Created: 2021-03-15 03:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e0db5720ceb7ef20e0626eeb1d46e47d SHA-1: 8ee8b542aa5dbf1fac6dde9233a1f5df7b85a7f8 SHA-256: cf8fd678d4119a2f77fca08780f7df5472db4ca2cb0244d727ea9c7fdada1ca8
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/award?keyword=javascript+programming+tutorial+for+beginners+pdf', are designed to lead users to potentially harmful websites. The document's structure and embedded URLs suggest a phishing or scam attempt, likely using social engineering to trick users into visiting these sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=javascript+programming+tutorial+for+beginners+pdf In PDF document text
    • http://pitikudefojeken.getenjoyment.net/how_to_clean_garage_door_bottom_seal.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/dixinoxavikeso.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/fhdpJW9/one_good_deed_a_day.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/loxifu.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/88281911828.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/affordable_housing_application_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/zovifesojeme/dOFhdOU/delidokosedokol.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/samsung_grand_prime_motherboard_price_in_india.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca5ee2f-6d14-4ae6-8f58-01ec7f781872/66631771534.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/41018574769.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_c3656e80f9be493b82d091fd5e9f016a.pdf?index=trueIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_8c4eadf4a1ff4270b08757341eff65fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a29a99f-f690-482a-85ce-84bb5127a6eb/what_does_unity_mean_in_the_bible.pdfIn PDF document text
    • http://risuveliki.rf.gd/confidential_case_filing_sheet.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_c03d2797f68149bb9829f2d62426d6e9.pdf?index=trueIn PDF document text
    • http://dojafeduzig.myartsonline.com/prenatal_diagnosis_of_down_syndrome.pdfIn PDF document text
    • https://592f3795-292b-4eb7-bb82-ca7d83343d16.filesusr.com/ugd/44d997_2787e5df1d9d4d79944ba565ecc03d50.pdf?index=trueIn PDF document text
    • http://barabita.rf.gd/29985795958.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_off00010415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10415 5664 bytes
SHA-256: 7b919c86497b2ef7c5c698915f277daf87f0f31253a06867c0dd786dfbb5e8ca
font_01_sfnt_off0001174e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174E 11548 bytes
SHA-256: 68e4ff3128c1997e27cbe6d3ef42cbaee8e2c9fadd3324bd857fedca69350baa

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