Malicious PDF — malware analysis report

Static analysis result for SHA-256 446ffd780ae47cfe…

MALICIOUS

PDF

71.7 KB Created: 2021-02-12 19:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 966115bfc74f7932759e7125f9a1d741 SHA-1: 0db8fbca103e220cb7f695aaf0edaa98a3d35fba SHA-256: 446ffd780ae47cfef96c09e6c484076332607c2cbd1868e6b88c32f89d8679cd
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=mcdonald%2527s+sustainable+competitive+advantage PDF link annotation
    • https://lutigasudubuwa.weebly.com/uploads/1/3/2/6/132695203/notuz.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/wuromit.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/f31ba141.pdfIn PDF document text
    • https://wobanavemo.weebly.com/uploads/1/3/4/0/134096337/zapegupawezifutas.pdfIn PDF document text
    • http://rokexulom.22web.org/70818016639.pdfIn PDF document text
    • http://helplnstagram-confirm.com/999554503724ucdl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pevurevakube.rf.gd/nafasezibojozavojuzax.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/special_warranty_deed_form_texas.pdfIn PDF document text
    • http://mimedixaresev.epizy.com/indesign_magazine_layout_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/sma_inverter_60_kw_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/what_are_barriers_to_effective_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/laminate_sheets_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/miledebalip.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/carranza_s_clinical_periodontology.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/fist_fight_2017_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/kadefi.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_off0000db32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB32 5536 bytes
SHA-256: bf011fbe34d2819589cbfb244af582bdba3fd10ce549bd115f671f8884459da0
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 10488 bytes
SHA-256: 5c26162595ba72326e18efaf8709243a16e159151809c2b2a3c205273d9e0e81

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