Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e48e3740a4301bd…

MALICIOUS

PDF

92.7 KB Created: 2020-10-16 15:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c8247c6feee677b8b5525b92d9cdcf8c SHA-1: 9d6fb7d4f505f02b6b1bff82927bd58210d79d60 SHA-256: 1e48e3740a4301bd7e056b6d2d36981e58cae0dd49f5376e624f4942f50dd176
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm and the ML detection suggest an attempt to distribute malicious content or redirect users to harmful sites, potentially disguised as a manual.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.ru/pify?keyword=cressi+giotto+manual+espa%25C3%25B1ol In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/ab8a878cd9764d3.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/bisavilokutedalov.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f88720bc0a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f884bb2cf804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f870881df57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f88f0e9d0d2d.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/3c1f7b77-b531-4937-a0db-5320df2e5e03/kifubezezupovujunarozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f6900ca-c266-4957-bece-698035f853fc/xavizadagivuzeruromufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf84652-2564-42ac-afdd-de50d1911500/vonepifemurisozoxolijume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9157d6bd-394c-4c64-b98d-7bbb01ae8017/jotomiwajejofudejiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4274b5-dd9d-4e4d-93b8-a9f8cce8ecf5/57202101869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c716d4ce-0a39-40c9-af56-263131d037f8/wabaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33645380-7b93-4636-85b3-1f5eb860c71c/7244003134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6234f4a3-b882-418a-8305-b79e972f232c/genewuzibixevuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cafc9398-1d1f-4205-9ccf-53ec5afcd7e4/65372830517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5478/7477/files/mopedijitexarafiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4685/3016/files/vapami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2435/0375/files/shading_worksheet_middle_school.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_off00012d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2A 5256 bytes
SHA-256: 45b89c2802b783f36a3c7385857eb8537d1423f70c129232c3e771320b56ccb5
font_01_sfnt_off00013ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAD 10804 bytes
SHA-256: eb24e03ea45dfaf1e8e1a73d479a0195a0f1b0c71f4e73a8c490568f6e90f8ae