Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4be4b2dd26e4ce…

MALICIOUS

PDF

73.0 KB Created: 2021-05-13 21:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c6b9b8da2b891188027a5137c6e4cb86 SHA-1: d7984b40dd28a8c3c7fb2a608751999ec5e2c9c1 SHA-256: 4d4be4b2dd26e4ce796a9ee031e5c2eba1ee6e4b4e4ac62fae86c5c5e50a6f25
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to 'seumenha.ru', suggesting a phishing or malware distribution lure. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support the malicious nature of the document, which likely aims to redirect users to harmful content.

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://seumenha.ru/strik?utm_term=what+is+the+best+dehydrator+for+deer+jerky PDF link annotation
    • https://cdn.sqhk.co/zotenejek/jcbicTW/tiger_shroff_new_song_all_2019.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/download_1100_words.pdfIn PDF document text
    • http://nopisodozig.66ghz.com/rujodowi.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/GfuThcf/76066361510.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/ggfM8jh/59481961263.pdfIn PDF document text
    • http://fijazubelanulek.mywebcommunity.org/xajarolarojinizadaw.pdfIn PDF document text
    • http://tajavimisafom.22web.org/foribevepobusinoni.pdfIn PDF document text
    • https://cdn.sqhk.co/pobisobat/HicKe9Z/how_much_does_animal_planet_go_cost.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/89f985b3-da42-4e5f-a182-594a436ee9f3/microsoft_excel_2013_free_download_for_windows_7.pdfIn PDF document text
    • http://sopidur.epizy.com/39396948613.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/yale_keyless_smart_lock_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591cbb49-a16b-43fe-bac0-4b03b8557bfa/what_type_of_special_bonding_does_sio2_have.pdfIn PDF document text
    • http://sitasuwa.epizy.com/35019387876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228dff25-6e44-4179-81fd-9e74e8d97fc6/defending_jacob_apple_tv_how_many_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d663c37-3790-4593-af47-15013df8a9dc/how_hard_is_it_to_learn_medical_billing_and_coding.pdfIn PDF document text
    • http://doruxujegajaso.rf.gd/dunkin_donuts_pumpkin_coffee_black_calories.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/25394459568.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/paxapowufimatimedik.pdfIn PDF document text
    • http://zuruwejofuxeja.epizy.com/il_calcestruzzo_armato.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/what_does_the_abbreviation_wyrd_mean.pdfIn PDF document text
    • http://jesuxesuner.rf.gd/calicivirus_felino_patogenia.pdfIn PDF document text
    • http://litorow.myartsonline.com/how_do_i_learn_basic_english.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_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 5360 bytes
SHA-256: 93495284b2e65deee7dba030c69bad01882ea413e7a037ef5c61037d46033822
font_01_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 10212 bytes
SHA-256: adfb5ca273af2a8fee45bda01bd1914bb6b8eee777ad07af1f1393eae01fde61

Open this report in the interactive analyzer, or submit your own file for analysis.