Malicious PDF — malware analysis report

Static analysis result for SHA-256 7795048083ff375c…

MALICIOUS

PDF

110.1 KB Created: 2020-11-22 19:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 209dea183bbaee57d60b8a93fae2e05b SHA-1: 6515b6fbe13e3baa9154fc52120ce25bd81e2003 SHA-256: 7795048083ff375c0853094ed69d84be630c290cfb77a69467b89b2bc8573e62
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to external sites.

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://trafffi.ru/aws?utm_term=navratri+bhajan+song++pagalworld PDF link annotation
    • https://xisovunegukizak.weebly.com/uploads/1/3/4/8/134868464/2a47d18.pdfIn PDF document text
    • https://xujifedivo.weebly.com/uploads/1/3/4/8/134862591/5215309.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/5876586.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c606b9-6f31-4a26-b73b-8c63f0ba179d/osmosis_jones_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b501dc-edaa-41fc-9a30-7b6bffd86eea/shogun_sushi_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc876456-83e2-4572-8419-49317f557dac/elite_force_m4_cqb_upgrades.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/kunovivajo.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/kitaro_matsuri_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/pottu_amman_movie_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc75d36-3cfd-4562-8f03-193303808178/35899467114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4308182b-0d11-4a18-b31c-b15b4ba974c6/13730794991.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/28778641809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5220d61-faaa-4cd9-a033-ab88e94e26c1/st_anthony_high_school_basketball.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00015f05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15F05 14048 bytes
SHA-256: 50686e7d5153ab45208cea8dc1d077cd4d627c5dfabda5501479048d2c5ea5ba
font_00_sfnt_off00014c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C13 5560 bytes
SHA-256: a023c175adaa658b454ccb976600c3d13fca7e143fb51abb8e81b0f52ee65dbb
font_02_sfnt_off000186c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186C9 10756 bytes
SHA-256: 421106ac9d45223408d4b715500a68a8976e4e0614f60ff1f9ae81bccc014392

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