Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7d7ddfe36a1c2c…

MALICIOUS

PDF

55.5 KB Created: 2020-10-25 12:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fe2c69f2ab0cec5699accbb37136313e SHA-1: 4883e7ae7ed9d3adb796f9a00efab896a4836c1a SHA-256: 0f7d7ddfe36a1c2cf4a5fbcd9ab7a1797b13250e3795bb970c263180ecb012d3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though partially corrupted, contains a URL that appears to be a lure for a 'project manager resume pdf'. The presence of many external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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/123?keyword=project+manager+resume+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f89dc9f969d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f875d4cf41d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f8a7754ab0b1.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/002d930dca.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/6194923.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/mozakidubuz_weviderara.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/ac4fe8b8-5caf-4662-b78d-b5b679b94291/descargar_imagenes_gratis_de_rosas_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58071faa-e963-4c6b-b0de-3b11e4ddddca/46125615088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7928bae-25cf-48c6-8ec7-4820df9bca3b/52916178709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724fdc7f-9321-49cd-9ee5-2ba0c4e9f09c/kisikopijadugij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b3c744-c5dc-48b8-82b5-90f07c062f0c/5283622595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6769ff-6fde-438a-a451-0faaceaac158/rowe_p_stayton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb8e94f-af08-485d-9c3e-06874dd46d75/9731441224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7364550f-93d2-491c-8e84-dc05d16d3a0e/incarnate_construct_3._5_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16ac5fb-f65a-4344-aff7-d88717518bd3/pazesogusabene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c7127c-f3cb-4285-85ba-59253319b40c/kokuvelijafewem.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/67513058652.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/26937131545.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/kasawunotunuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/3162950995.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/57756102253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bd7842-1644-452f-8aa9-cea1ab30432c/lukesuvapudus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4107f7bb-5f38-4a51-b328-583184a30c35/80344174328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da70650-4a97-4523-9252-e16db9f84d7c/fesowevotaxepuxebuvozuzik.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_off000096fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FC 5520 bytes
SHA-256: 702a58c434756251915f02b301eff63e454e9a2c7efc16daa2ea7d3b8bb3cbef
font_01_sfnt_off0000a9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B0 11556 bytes
SHA-256: 30aed43e863e87d550fe305283bd88ade33842f269b40e455840565a5814d4e2

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