Malicious PDF — malware analysis report

Static analysis result for SHA-256 504b2343ce9d20f8…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 16:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: afb78a814aaf214957c17924d4ab0cee SHA-1: 0fc164a4c138a604d5bbe674922ec9e85c89f5a6 SHA-256: 504b2343ce9d20f87c66dee66a927f3df863a02f81fc9a372947084d5ca59239
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/award?keyword=wendy%2527s+cheese+fries+calories+no+chili PDF link annotation
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/sofaxarom.pdfIn PDF document text
    • https://cdn.sqhk.co/pojukitogex/O2hgoii/splash_mountain_princess_and_the_frog_release_date.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/82487723956.pdfIn PDF document text
    • https://cdn.sqhk.co/wekajibex/hahbifW/merchant_definition_english_law.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/Bgeja1a/nobibaxevapap.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/d4ggzja/nethack_online_multiplayer.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/mekonulegipero/58850340455.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/zuvazivaxakopateneni.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/toxapafowulu.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/roku_remote_1_2_buttons.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/wabogidupi.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/backup_my_android_to_google.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/blank_certificate_of_authenticity_template.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mozonorale.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/tamil_movies_2018_in_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/hammered_copper_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/conflict_management_powerpoint_templates.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_off0000e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE135 5260 bytes
SHA-256: 8696f3834ebe4992894919d2502307bd0806a349e8a65fbe54395612be118d25
font_01_sfnt_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 10612 bytes
SHA-256: 2c77be56c2dcb21215e7b012e63ebce16028bb90ce9792246ba6d966c01801a2

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