Malicious PDF — malware analysis report

Static analysis result for SHA-256 67137e412e66adc3…

MALICIOUS

PDF

44.3 KB Created: 2020-10-29 02:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f1e28154a21eaac8c65121ca94ca27cc SHA-1: d9b0eb00226395714d1b4332a7a19595e834b153 SHA-256: 67137e412e66adc36725c948bd062df699763697ed274bb55bd6160e6dc8634f
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 1.0000

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/strik?keyword=gta+liberty+city+stories+cheats+ps+vita In PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/pesaxutidika-tobimon-riwukimekopa.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/kimetowaginox.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/migevenekexumos-zagageluzudo.pdfIn PDF document text
    • https://renibopasuviwi.weebly.com/uploads/1/3/4/3/134305424/nonofov.pdfIn 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/31c49751-aea5-405a-938e-20248b0f634d/jonigexutesutumemasijupum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1daac2-4cc8-43a9-8013-52496e70e3ab/guvolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb706e19-aa30-463a-a623-0668d7e35a97/historia_de_rio_blanco_veracruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e65e84-39f8-4cf7-a738-d390d3555875/dixijevujitobugitafuluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c69f48-3886-4964-b12b-92c2d69b5eb7/xotigaterupofefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c16bd3-d76b-45a9-855d-67f2cbb166fc/29478999790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4ee2b6-3184-4706-912e-db6c2d0977d5/songslover.com_music_albums.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d4c4fd-c10a-4b04-a785-58aa83ce0100/flushing_a_foley_catheter_to_ensure_patency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27919f00-2dda-48c4-b24e-19005bd45d90/aaaaa_aaa_aaaaaaa_aaaaaaa_aaaa_aaaaaaaaa_aaa.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/kigusopixejepalonitifojun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b253dc5-5535-4418-a848-28d2f2dc7227/67605863882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0005032b-2178-46a1-8f86-ddfe8c6909fb/siwofanuloka.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/zowapevifetupuxufonavo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/zudawabatoralar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00cba4d-cc8d-4036-b1bc-67539bc46c57/78569603993.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_off00005f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 3220 bytes
SHA-256: 49cc9cbdc25711050fcd4f33f5cda9bf21e2142aae7ab0899e423122c9289fd4
font_01_sfnt_off00006ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 5356 bytes
SHA-256: 2cf51f25bad437eac3233aecd3154664b0e1cf14f90185a0f0986f046faa056c
font_02_sfnt_off00007cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFF 11560 bytes
SHA-256: 54dcb65907bc52134aa41e9a4f13f5bea5d1f65fa5c5b19d5c8cc7d50be73423

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