Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceccbcbefdf767d7…

MALICIOUS

PDF

123.2 KB Created: 2020-11-24 21:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee2f3f763cb6b3233955f8db3e66a791 SHA-1: 117cbc5c7925074eb355af5937bd84b877778c06 SHA-256: ceccbcbefdf767d7f5b3b7341907ca2048bc5533b8f89e919bc6c77a9e3945d3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=wand+of+fortune+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f8e7fa232968.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/6236028b94.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/gilodumisubumef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_5fa593959d912.pdfIn PDF document text
    • https://wizodorifezeniv.weebly.com/uploads/1/3/4/7/134715638/d45d56980.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/817ac62e-8b42-440d-8b5b-410e38a84e97/samsung_un65hu8550_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/mofilatojapasozusopiwerum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe5872d-1750-4832-b79b-09fbc2b51e12/black_lapel_vs_suitsupply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168c1c60-37c6-4880-91cd-c428dee272f3/dusarisutekasabubinabamok.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/ridozafoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ae9308-80c0-4f02-a9ca-bb9df8988d36/77587573156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c690078-2aac-431c-ab8e-f5af36b6d4ab/zudumeputimonaxadafot.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/black_and_decker_spacemaker_toaster_oven_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd7f037-87bd-441a-8867-90e7e138240b/keha_mehaanika_fsioteraapia_london.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/exceptional_c_style_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/49985864107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffca1c1d-19cb-4744-8f92-b0db9e0f227d/gobenatopasulatofal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00018854.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18854 1788 bytes
SHA-256: cf2f42e0f0ea6ab6b0be22979fb4c20c642b63436fed8dc8ae3b2f1f693e9c9b
font_00_sfnt_off00015df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF6 7632 bytes
SHA-256: 538aca9bd40f535d6210ce6cf2bf6418fef4aef6086f806ba65c853c026cc802
font_01_sfnt_off000177c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C4 4836 bytes
SHA-256: 2ec237cf2a2f6f1ac7ee2a4066c0ce13562e59b5a39502b29bb2bc58ae6bf4d5
font_03_sfnt_off0001917c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1917C 1532 bytes
SHA-256: 5984d7ea84ce52f79bfc72da238a19662e350133a9fd1abaac5d65555fef9c0f
font_04_sfnt_off000199d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199D1 12060 bytes
SHA-256: adbf2a9a53875110d21d393c010c9a6e82206771d06c5626568b65974d535359
font_05_sfnt_off0001c316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C316 17608 bytes
SHA-256: c93dc083621b7664fb16f61f8cd6ca7d97aa414e287a0848006c75ec73b44857

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