Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9abba2e41324ba…

MALICIOUS

PDF

69.0 KB Created: 2021-05-01 07:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 234f34c892d77da3558ad6c3037aac09 SHA-1: e01c7471638c75a35d0c1580ad94a436043709ba SHA-256: cd9abba2e41324ba2e6ce16fbb73dc1c666ffab535e6e3bc6b84bf71305947d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a phishing or spam campaign, indicated by the high number of external links generated for SEO purposes. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or exploit kits. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jottigo.ru/strik?utm_term=hakko+fx888d-23by+digital+soldering+station+fx-888d PDF link annotation
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/wopulugepumusixefuge.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/7b365.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/lonibojeguvimo-votusivugo-nojivaromix.pdfIn PDF document text
    • https://wazumiwu.weebly.com/uploads/1/3/6/0/136038811/9d7c41.pdfIn PDF document text
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/9015194.pdfIn PDF document text
    • https://rovisudaguxu.weebly.com/uploads/1/3/1/4/131438800/pebuxorupex.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/nalifij/material_requisition_form_template_word.pdfIn PDF document text
    • https://58fabbca-0322-4868-a582-948aa19840f9.filesusr.com/ugd/93748c_06dbedd9591c464db1d9e5971aff8625.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatisake/cbse_12_exam_date_sheet_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/don_juan_restaurant_menu.pdfIn PDF document text
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_a7c9ce2ac4e14861b98fc880bedfb5cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/ielts_reading_passage_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/mueller_report_podcast_lawfare.pdfIn PDF document text
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_bd1795953c4b42f9aaad7404e78412d1.pdf?index=trueIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_fbddca546b6943f5bab765a30f0de85a.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_30e45ac376814d8a95bafa7b59f46186.pdf?index=trueIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_60a360cbe0cf49b2893f29720c8655ac.pdf?index=trueIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_4dc5b42d2550438aaa62d4c2ddfe186e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/how_to_tell_what_ezgo_i_have.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_ff9eae9f98a44fc1a1eeb955f0639758.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_2335efce905542d98ec0bc4e6cfa4855.pdf?index=trueIn 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_off0000ce78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE78 5932 bytes
SHA-256: ec439e3edf74b1d9f4e3ea8d07855909da279f508536af0c39e71d76f832b346
font_01_sfnt_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 10380 bytes
SHA-256: 481b2cfbafabd10b0d3cf48b7259b90c2ba5c86120af5291337a77b3a50effc6

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