Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac37f52a7e78f2d…

MALICIOUS

PDF

41.7 KB Created: 2020-11-07 03:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 952d82d7be7d3d3e48d294d1604774a3 SHA-1: 0635d7d5fa440992e98a29b4e245f8004124ba88 SHA-256: cac37f52a7e78f2d0ee1bb675264ef5988f1b064bb1b4b7447a0ac9ca4a9506f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://trafficel.ru/aws?keyword=egg+coddlers+buying+guide PDF link annotation
    • https://gazofifato.weebly.com/uploads/1/3/4/4/134496451/db7283ea7dc1.pdfIn PDF document text
    • https://pewoxunoxosizix.weebly.com/uploads/1/3/4/3/134318290/8141121.pdfIn PDF document text
    • https://gofubajub.weebly.com/uploads/1/3/4/6/134632898/3538527.pdfIn PDF document text
    • https://benoralegofalaw.weebly.com/uploads/1/3/4/5/134581061/8732e.pdfIn PDF document text
    • https://gewivobom.weebly.com/uploads/1/3/4/6/134643535/gotobevoporaduzige.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/8788084.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/rijuxilidagedit-mapukozazunu-vakuwuxini.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/menedo-fodizelusekom.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/zurovajij/64876061876.pdfIn PDF document text
    • https://vazebaz.files.wordpress.com/2020/11/3740524799.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/panubujuwidoguto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aaca6d5-2589-42be-baf4-e6a2b25c890d/23203835528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbff6dc-ca9b-4603-9059-b383645c6b21/fumepin.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/calendario_rusia_2018_descargar.pdfIn PDF document text
    • https://tazitox.files.wordpress.com/2020/11/44143072336.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/89126727556.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_off00006403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5096 bytes
SHA-256: 44ca1204626cc9fe9ffb9176e96f9300ebd900be7cb6e2f4f245c74e7314fa65
font_01_sfnt_off00007575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7575 10584 bytes
SHA-256: 7ba2a6d7b8087cea836744726b494dccb1659fe4b392da4ea0ac1cc346223292

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