Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8cdd7819c3b3b2…

MALICIOUS

PDF

78.9 KB Created: 2021-03-11 02:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c820e9502b45f489bfa0ac94a4db995 SHA-1: 11971d29b0b39eb95dc446bb47993c33fd74334f SHA-256: ce8cdd7819c3b3b2764f85970a772f886f8449c57c63b2bdc6aa6c640fc91f99
164 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=rwby+white+rose+moments PDF link annotation
    • http://xorabawik.medianewsonline.com/what_is_the_best_antenna_for_a_cobra_29_ltd.pdfIn PDF document text
    • http://tadajixilatu.scienceontheweb.net/what_was_on_page_47_of_the_presidents_secret_book.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/giieji0/color_of_the_last_ball_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/msXZVia/76701196012.pdfIn PDF document text
    • https://cdn.sqhk.co/tiluzegata/fZhiuec/tubulukotibo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugosubexez/xefidepobedusepokenafix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a1ac8a-ef5d-4ec1-9120-59a187559f00/42014712021.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/que_tiene_que_tener_un_botiquin_de_primeros_auxilios_en_una_empresa.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/mike_litzen_guide_service.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_002b9aca605944be8de365cf4254bf21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/nadas_pediatric_cardiology.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/marvelous_designer_7_enterprise.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_617d79c879b24adda5292ec0cb15ca6f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcb0d0a-425b-4aa9-b2f5-ad313c2345e8/jejesewosabepiromivisaxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/banisitegufuwulotilewasis.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/chevy_bolt_review_consumer_reports.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_48e6e0780fa542dc8ad678b47fbae00d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sejakopa/21574876548.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 4812 bytes
SHA-256: 326568f87cb64d5279e7ba99eb609d627537406836979ecd02dc4c05c1ae4b8d
font_01_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 10380 bytes
SHA-256: fe0f238770c1c184b555404650674f91ee2a463c9dfd1687d18a02697ec6f1cb
font_02_sfnt_off00012044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12044 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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