Malicious PDF — malware analysis report

Static analysis result for SHA-256 56593a5731ae5677…

MALICIOUS

PDF

66.0 KB Created: 2021-01-14 23:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a9befbfc060f69be17f953e97586df13 SHA-1: 91f1b8719e8b0b0f9860f7f992a7b51226f6b033 SHA-256: 56593a5731ae5677369e0de560f0df0c05c3ddc364d0ea5df8a8f6dd66f9fb24
214 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 and routes users through malicious redirector infrastructure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=370+article+in+kannada+information In PDF document text
    • https://pejifivoriruruk.weebly.com/uploads/1/3/4/3/134314693/vukiler_folezopexag_rupezilon.pdfIn PDF document text
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/6a149429c.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/getovekiwivideretote.pdfIn PDF document text
    • https://vumazara.weebly.com/uploads/1/3/0/7/130738753/cc6992d.pdfIn PDF document text
    • https://tipidaxu.weebly.com/uploads/1/3/0/7/130739537/ranareruwoxewidofiso.pdfIn PDF document text
    • https://zisatusomet.weebly.com/uploads/1/3/4/8/134872515/1921003.pdfIn PDF document text
    • https://janaravepok.weebly.com/uploads/1/3/4/8/134886337/7888157.pdfIn PDF document text
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/wibovapunozigud.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/hLXchcD/ice_cream_coloring_pages.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/c9jhagd/fastlane_road_to_revenge_hack_mod_apk_download.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/lorifawuvawot/paramount_biology_book_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/cantico_delle_creature_branduardi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/bemik.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/bus_simulator_3d_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/midopoxifufisonu.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/6392385252.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/complaint_against_teacher_letter_sample.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_off0000c5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B1 5344 bytes
SHA-256: defac9e4397e11adebb3fcddfae22c0b9c224a9074531819671b8184f8c748cb
font_01_sfnt_off0000d7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D3 10100 bytes
SHA-256: 17064daef6e51e9373a5cfc08c40142aff19ca476e40657e065b99d9f61c129d

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