Malicious PDF — malware analysis report

Static analysis result for SHA-256 92978a56992dc208…

MALICIOUS

PDF

90.1 KB Created: 2021-03-22 14:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f4da08b06a70b641727961d9e592eb87 SHA-1: 4a5694221dd6cce99b052161b6b7ac5f4780c1f1 SHA-256: 92978a56992dc20821ccf797d0e6097d0d9b639b819117e02fcb608318d8b51d
156 Risk Score

Malware Insights

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

The PDF document contains a high number of external links, identified as a PDF SEO link farm, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs points towards an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=los+cascabeles+magicos+pdf PDF link annotation
    • http://e-devletturkiyeaidatsistemimgovtr.com/old_school_bagel_cafe_menu_nutrition5p76e.pdfIn PDF document text
    • http://wisalifo.22web.org/fesokelad.pdfIn PDF document text
    • http://cabinetsly.xyz/pokemon_journeys_episode_reviewxwkd6.pdfIn PDF document text
    • http://bio-ita.fun/washington_post_subscription_customer_service_numbervnuce.pdfIn PDF document text
    • http://ufenmac.com/roxiworejafadimilufuvilmnzj.pdfIn PDF document text
    • http://gotexewadegu.iblogger.org/sikosamivezafusevaw.pdfIn PDF document text
    • http://bufenukaje.22web.org/address_format_in_single_line.pdfIn PDF document text
    • http://pedrons.space/38738619694qeyly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_16169970e666459b9c20a167033f66db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luropi/22954051105.pdfIn PDF document text
    • http://divifafapinuk.rf.gd/zamogojanujabolasugur.pdfIn PDF document text
    • https://6cdd0005-1a36-4349-8ed1-a31ee749247c.filesusr.com/ugd/9e53d4_c99cdb2f47ac424ba8be19240f9283b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/bosigenatagizane.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/squirtle_shiny_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/96608827059.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/76913933510.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_e898a844b5054e2885ce7ef3c54b3754.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/favezenebi.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/plane_racing_games_android.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_4975031abba04d259fb099ef33b4a5d1.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_off00011e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E30 5460 bytes
SHA-256: 07653584191e8637e09a916bc7da5fda20e27290c96b62826fb36ab622ff7fc3
font_01_sfnt_off000130b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 12908 bytes
SHA-256: 4a53c3a9fa325fabfd5f033017f69efda37ad41e37ccdec45c53176340aa6c7a

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