Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ece6d14787b2eb…

MALICIOUS

PDF

67.6 KB Created: 2021-03-16 21:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5a2573fd281afa6baf8b091dc960bb38 SHA-1: d6933af4999cf2d2c186e57762f34ef8e6903ac2 SHA-256: b3ece6d14787b2ebfa84878bced8e916cb9133a32f4149c269b32e2ac7737d0d
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to redirector URLs like https://kuzutuzo.ru/wix?keyword=radio+flyer+wagon+toys+r+us+canada. This behavior is indicative of a phishing or malware distribution scheme, aiming to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://kuzutuzo.ru/wix?keyword=radio+flyer+wagon+toys+r+us+canada PDF link annotation
    • https://cdn.sqhk.co/xubipoxeguza/1jgggfc/bafokefatalalisulelifi.pdfIn PDF document text
    • http://dragonflysagewellness.com/remevidulue1uzk.pdfIn PDF document text
    • http://d-youtube.com/metro_2033_redux_walkthrough_dead_citycv98k.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/bank_exam_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/duzimisese/6HVhcRo/55753550940.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/textes_apocryphes.pdfIn PDF document text
    • http://all-casino.xyz/anime_app_for_android_tv_boxf1ztl.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/absorcion_de_nutrientes_en_el_aparato_digestivo.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/jbheiht/flipkart_online_shopping_app_for_pc.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/76382318743.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/ijghihf/birafuvivafirogi.pdfIn PDF document text
    • http://spoonnumberone.xyz/babirigekasuvuximevuxivomipoo3.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/3EjiCU5/acrylic_nail_designs_white_and_gold.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/rujimidujek/somaboduvifen.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/what_is_google_workspace_business_starter.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_8f21c4adbd2b4a63bbee4c70731bd6a9.pdf?index=trueIn PDF document text
    • http://tifavamifikas.myartsonline.com/johnson_40_hp_outboard_motor_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/bbuddah_hoga_terra_baap_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/the_law_of_attraction_2011_full_movie_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/toro_sprinkler_timer_not_working.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_10cf1733fb8c4e8abedd375f2d1377d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/duregukinibipelozapabokaw.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/87664739088.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_3d44c56f61ff418fb7c22c22f6c4e957.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/87718206923.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/burivetuxogapamogi.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_off0000ccf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF7 5392 bytes
SHA-256: 639aa476c19f3ef45e839b0881b3c116b3a9701db89101bec5cfd956204dd3ac
font_01_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 9828 bytes
SHA-256: 22219a263460c1c8fd5ba2ced8c6b3286c0981807c1bc0fe5bab3909969fd041

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