Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23ac66cdbd2fb30…

MALICIOUS

PDF

79.4 KB Created: 2021-03-02 19:30:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 17ce33ea92017ab1cfc7ac17937d84fc SHA-1: cefb48d7196d59ab903b1bc566f7a0cd1a5e33e1 SHA-256: d23ac66cdbd2fb3077146f6534084492e86614b273b351bddd18dac195dc9700
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to 'apk farm heroes saga mod' and a high-risk heuristic firing for a redirector link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it's the primary mechanism for delivering a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=apk+farm+heroes+saga+mod PDF link annotation
    • http://bobr.space/faziriae7dh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_602a1c19ec3a0.pdfIn PDF document text
    • http://alania365.ru/67155864444q9x1.pdfIn PDF document text
    • http://kurozux.iblogger.org/wemijovutikavemekopeze.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/lurutopobi/1734-aentr_set_ip_address.pdfIn PDF document text
    • http://deroselewem.epizy.com/car_wala_cartoon_video.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/free_fall_border_templates_for_microsoft_word.pdfIn PDF document text
    • http://guxenubegipus.epizy.com/twilight_2008_full_movie_download_in_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/unscramble_words_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/lajadomatu.pdfIn PDF document text
    • http://wekidezeze.epizy.com/islington_bright_start.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/lip_balm_container_label_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/ziverexe.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/78778919203.pdfIn PDF document text
    • http://kijaripejugap.epizy.com/stick_warriors_fighter_street_vip_mod_apk.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_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 5476 bytes
SHA-256: ea68a0fd15e0b357fd709b27a471606281323595d76ac3f8b90f2c94033fc267
font_02_sfnt_off00010d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D94 10120 bytes
SHA-256: 716aa947601f2eb3156c9ca4262d8d7bfce7c484782885fbd43724911a7a57ff

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