Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c27f55ddd850074…

MALICIOUS

PDF

40.8 KB Created: 2020-10-28 21:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 530a9bb27dbddc7c487919bb9d724210 SHA-1: 24e7c891b0a61cdcd7c6e5a95c15f6c0d600af1f SHA-256: 5c27f55ddd8500743b828c1ed8f77cb2f3453e5258e876970b4cfaf42d33c7e6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to direct users to harmful content. The ML classifier strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest this document is designed to exploit users through deceptive links, likely for phishing or malware distribution.

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://gettraff.ru/strik?keyword=figurative+language+2+answers In PDF document text
    • https://kerumesuni.weebly.com/uploads/1/3/4/1/134131613/b303a57f236e71.pdfIn PDF document text
    • https://tivexafo.weebly.com/uploads/1/3/4/3/134348633/muwigemasoraxodaziva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5f97620293214.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/29c6ad.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/nomiwi-nenazanosuzet-raxuxasesif-petese.pdfIn PDF document text
    • https://mupififidimob.weebly.com/uploads/1/3/4/2/134234858/sakufog.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/9534007.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/ed32395127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8c805020414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f8abd9c7fb51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/define_pulp_fiction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9304/2362/files/40217600244.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/88548670198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/gokexelenemakifudipiba.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/badagry_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9392/7081/files/physiology_of_respiration_in_mammals.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/36293643004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/bumowukobamox.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/11420665901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8521/2064/files/tizemikarufalusufolale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8198/4925/files/purple_lotus_wow_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3302/0584/files/jobevekarizepufax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/8353/0139/files/traduire_un_dossier_en_anglais_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/citadel_miniatures_painting_guide.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_off0000604b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5092 bytes
SHA-256: 1f60ce33eb8712f9d77fc9cbc44c16a009f6c61462b450305611df8b6ab913cf
font_01_sfnt_off000071cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 10580 bytes
SHA-256: 4985ae4fc6bfb7e0a125b86ef778209ddc51a0b55c2cdee717549ab0f4d2fb5b

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