Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce655f00e8f571af…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 10:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ee5105c4f43f39c81b1f4de3d969f6e SHA-1: 37e15ef0dfa9990f1a76168f010ee3975c42d6b7 SHA-256: ce655f00e8f571af43eec725be9cbbbd6fcd15ec3f43de9c49be1b18a39eeed5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://golowaki.ru/123?utm_term=c.+a.+t.+s+game+hack PDF link annotation
    • http://my-favshop.online/new_york_2140wjufu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459917/normal_6002ff4ddd545.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/can_you_keep_netherland_dwarf_rabbits_inside.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_602c139ee492d.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/beats_solo_pro_wireless_noise_cancelling_on-ear_bluetooth_headphones.pdfIn PDF document text
    • http://biomanix.best/10559972269txdbq.pdfIn PDF document text
    • http://konolux.medianewsonline.com/refupibarutiwufibix.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/the_easy_way_to_stop_smoking.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_602ed3a60393d.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/agricultural_and_food_marketing_management.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/sotemanukiz.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/xovekolamoxe/goodnotes_calendar_template_2019.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/55027839581.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/nezevikofinurumagu.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/vsepr_worksheet_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bac754-36c7-4afc-b213-912e16ddc10e/48809190978.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/1001_albums_to_listen_to_before_you_die.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/what_is_an_example_of_specific_deterrence.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/chester_bennington_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97fe84a8-4804-4924-840a-123221caa8b9/41068294012.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_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 5084 bytes
SHA-256: 60cc58cedb31971053b9ba8c4518cbf90f3a85a15bd2bda95fbc10084249eb33
font_01_sfnt_off000101c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C8 21560 bytes
SHA-256: 4791fe65bc5e3d45532722cee85c03ccb5d65d81d8a2b660c2334676cdeac62a

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