Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe8b4b451109176…

MALICIOUS

PDF

85.8 KB Created: 2021-04-12 21:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b48b3df6074e526231206d2043a8889c SHA-1: 24c55bd524388ea50ff9cbfc025268165189f2a1 SHA-256: ebe8b4b45110917611f16577a7ebdf70b4ca1efc919e25454bd744855bb5230d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating it likely serves as a phishing or malware distribution vector. The heuristic firings reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the document body's content, though obfuscated, further support the attack pattern of luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=the+magicians+alice+quinn+niffin PDF link annotation
    • http://tixanijematewe.mypressonline.com/muslim_girl_baby_names_with_meaning.pdfIn PDF document text
    • https://juduloto.weebly.com/uploads/1/3/5/3/135323899/bobozebaver_totilemizeti_rigafelutovabif_gobikus.pdfIn PDF document text
    • https://satiwumufov.weebly.com/uploads/1/3/4/7/134724604/1a518b.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/graphic_novel.pdfIn PDF document text
    • http://pumejinidekupi.22web.org/political_map_of_south_america.pdfIn PDF document text
    • http://jezolagewe.iblogger.org/transformation_bulgarian_women_s_choir_lyrics_translation.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/rtu_b_tech_mechanical_syllabus.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/abdomen_agudo_quirurgico_inflamatorio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kotorewijog.epizy.com/lotewenujavexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3585c9b5-4740-4819-855d-5ebe6d45a574/xibafopowofati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29750ed4-049d-4a4e-b2ad-a338cb1e9311/historia_de_mexico_prehispanico_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ea2074-bd91-4b42-85c0-b976463b9e7a/silence_becca_fitzpatrick_movie.pdfIn PDF document text
    • http://jabukejezari.epizy.com/71720443370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae4ec8f-a444-4a66-b173-864104078cb0/best_corporate_image_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce33c4f-79f6-427e-b6bd-15f2ba3ae860/tales_of_demons_and_gods_manga_indo.pdfIn PDF document text
    • http://tiredosutozol.atwebpages.com/expediente_anunnaki_librojuego.pdfIn PDF document text
    • http://vezoxonu.epizy.com/nojediruxotadowokule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6afd9681-d891-4d82-af00-347f66f3e913/garmin_vivofit_jr_2_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfb9c69-995d-4025-97a4-b3ec007e8ef3/p90x_mass_schedule.pdfIn PDF document text
    • http://juvelanasamezu.epizy.com/18245994116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48419a66-517a-4750-b848-df16fd62dbe6/what_is_the_receptor_for_taste.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 4968 bytes
SHA-256: 8db412300e35814377e8108311ad1d9d10214a5a1e455b0dac76839e023a22dd
font_01_sfnt_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 12376 bytes
SHA-256: 3b952c1177b261cf347188e235da4dd6bb865db54cedf92e894d26053548c4e3
font_02_sfnt_off00013b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B78 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176