Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7049b4e046e9cd3…

MALICIOUS

PDF

40.8 KB Created: 2020-11-02 01:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 86624e55a64e5a573a5d8723aa715e45 SHA-1: d8f98db4aae24e543501e33aa849c9d57c896b68 SHA-256: d7049b4e046e9cd34c202e199e0b2e04de4e812c8cce0e49c56d76f0e15d6809
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=bee+syrup+mixer In PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/3c5a884c4e1ef.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://bupifepubeweta.weebly.com/uploads/1/3/4/3/134336259/4321368.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/3953438.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/0c4d75.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f8e04eaa07d9.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/4994421e-0c02-4f87-b48b-dfefa51beab8/jarebej.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/30241467315.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/32443751122.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/revista_natura_ciclo_17_2018_argentina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e80c2e7-95bc-4231-bd89-50af7f009975/68035591539.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/adobe_signature_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/nopolitosobodonabevezav.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_off000063fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 4944 bytes
SHA-256: dde73239c411cbc94957befd8492a01de97f4ab351a9609f47404bc3d49ecb1d
font_01_sfnt_off000074cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 10008 bytes
SHA-256: 1afc37b1f9b17f4b708a74902ce1050552c81b489adc5d46ad96b19d13701101

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