Malicious PDF — malware analysis report

Static analysis result for SHA-256 a077a9223b4e4598…

MALICIOUS

PDF

77.7 KB Created: 2021-05-08 15:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d33fdfd5fdb200ab0ee01c6b3ba1770 SHA-1: 530bfc09651e5a874d02a06b473968336a4c8677 SHA-256: a077a9223b4e4598e843d7f4b120d8ce4cf4d66bbf97ca2698d34d4ca3507800
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://mezovuduw.ru/strik?utm_term=how+much+do+indie+games+make+on+steam PDF link annotation
    • http://clubstore.info/26380979909brxza.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/sovowadeb.pdfIn PDF document text
    • http://turistik-a.ru/les_miserables_songs_lyrics_on_my_ownz3mps.pdfIn PDF document text
    • http://reetodo.online/fakefezibaguvivolipuzm.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/8574225030.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/caracteristicas_del_articulo_de_opinion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_db2ea148c74048aea79cb2d6454a888f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/50481757613.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_f63e8b07705e452d86b8b92798a3c3eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/191c64ca-ace9-423e-99f7-4ecf820f2b92/letra_haz_llover_vino_nuevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83b3f37-2e7a-43ef-9071-8bae2f3b5603/str-dh520_sony_specs.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_452dd2419f704b62b046e3dbdbeeb2a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e902f2cf-45fc-4ccb-9f89-5f5a8b7563d4/waminipojuwutegafil.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/vufawifuxoxagiserira.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/barbie_doll_wallpaper_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/filojadewarixaso.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/19786494753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a061414-bc4e-4b6a-8cae-abdcee3b75c2/mosisel.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/97866927031.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/organizational_chart_template_with_pictures.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_c67853c93e834fef8410e4ea698bce07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/14852453999.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_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 5340 bytes
SHA-256: 5af1b11e66c56fb7893ece06fe3a83d5a65391c99ca4c051db8340f95c66374b
font_01_sfnt_off00010289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 10840 bytes
SHA-256: 640cd98a8fc6a9a880e7bea9fee22a5cbb717b4099642b3eb008860a8bebd7c9

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