Malicious PDF — malware analysis report

Static analysis result for SHA-256 22bde58fb0bf419d…

MALICIOUS

PDF

80.9 KB Created: 2021-03-09 00:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 597d69207b476cf709d75904daf142fe SHA-1: 690d6922b600330273441d778082455083a0e2ed SHA-256: 22bde58fb0bf419d6f3a9e4b85ac653fdd07f8f2e13363ab903c29d39b7bacf0
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely attempting to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/123?utm_term=incha%25C3%25A7o+apos+picada+de+formiga PDF link annotation
    • http://kawopewil.22web.org/ehsaas_old_movie_songs.pdfIn PDF document text
    • https://vatanivirasuta.weebly.com/uploads/1/3/5/3/135387760/ligurigofewovo.pdfIn PDF document text
    • https://jikabokuw.weebly.com/uploads/1/3/4/6/134658058/gimaduj-zozepoliso-bamaxojipepesep.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/1a69b3ea96.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/nja98Er/poppy_cartoon_trolls.pdfIn PDF document text
    • http://kukebeg.22web.org/the_birds_papaya_instagram_hate_account.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/eF8Rifl/6436396413.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/lomuper/zokagor.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/67153911786.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/certificate_for_school_project_format.pdfIn PDF document text
    • http://menenig.rf.gd/nuwisej.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_61ac9800aa9c40c3b0adfd254e7b90a0.pdf?index=trueIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_d621e90822fb4ab783f2c790ed924d57.pdf?index=trueIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_f6ac445ec6f94cbfb8951bda326bbf98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/archery_king_game_hack_apk.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_1e0b2052e77b493c85bf2be267273f0f.pdf?index=trueIn PDF document text
    • http://piwirapofo.epizy.com/karefebakowezoxewafiwisa.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_4305738f6a37486ca28cd392eec17564.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_2c9fea1f7331466685891377820670ac.pdf?index=trueIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_e02343e95b9844e1b246c3d306f636f4.pdf?index=trueIn PDF document text
    • http://ronodinagidos.rf.gd/lorafufuv.pdfIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_ab84ec79aba54a4e8d31894d84bf90ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/42838609422.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_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 5656 bytes
SHA-256: d5d8a2baac9cc7b89ee92c9b57118c4a0b49e27730c544ae48535267cbff903e
font_01_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 12868 bytes
SHA-256: 3c2199f3336e37d3f395adbb1b3cf29e2af417b3d43a66dbccd14d5f64f6f091