Malicious PDF — malware analysis report

Static analysis result for SHA-256 6897d896dda1f95e…

MALICIOUS

PDF

88.0 KB Created: 2021-03-26 07:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 10fdea72061cf05e405f352557cb62ed SHA-1: 2446f383988637d42fdedef9e37eec04010431f8 SHA-256: 6897d896dda1f95eb0cf74bf6fc7f4fe2c599a38c0306d7a2f88b6ca2d193654
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one specifically pointing to 'https://baarspo.ru/award?keyword=dbt+borderline+personality+disorder+pdf', suggesting a link farm or phishing attempt. The document's structure and content indicate it is designed to drive traffic to these external sites, potentially for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/award?keyword=dbt+borderline+personality+disorder+pdf PDF link annotation
    • https://bojomuse.weebly.com/uploads/1/3/4/4/134462584/toxadozelugajom_wogejoguzemado_moriza.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/673b572982e8d27.pdfIn PDF document text
    • http://usecabinets.xyz/28682066985n0bk4.pdfIn PDF document text
    • https://dukiferuxol.weebly.com/uploads/1/3/0/8/130873869/9448291.pdfIn PDF document text
    • http://rankingcoach-apps.com/tv_ears_digital_or_analogqewdi.pdfIn PDF document text
    • https://rutikaxa.weebly.com/uploads/1/3/0/7/130738846/092e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485939/normal_5ff7998d34e46.pdfIn PDF document text
    • http://lefenup.22web.org/71037427997.pdfIn PDF document text
    • http://italiahot.fun/93491617072kf6jz.pdfIn PDF document text
    • http://fullcreditreport.info/ffx_guideokc3b.pdfIn PDF document text
    • http://rasprodavaika.ru/57304936725k2e1g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5fd9937e71b27.pdfIn PDF document text
    • https://bunosepe.weebly.com/uploads/1/3/1/3/131379858/mesafajalonutuxufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_3838622344ae49a2a6430463a3ddf33d.pdf?index=trueIn PDF document text
    • http://tuguvedora.rf.gd/how_to_draw_anime_boy_eyes_closed.pdfIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_d5bfba1e8b2a45dc9926e8bae3900060.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_eadb5f08b5084c4b8e5da84506c1c0c0.pdf?index=trueIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_8ae006168b5f4449be0acc349930d84e.pdf?index=trueIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_fa05201e9e4f4972842d6988da77058c.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_2f26c823baf34631850ed952d1698fed.pdf?index=trueIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_12bfc4bedf5548a299616ca7bb1ca1ea.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 5276 bytes
SHA-256: f74bdcb3cedb2e424a1084a4d1d3835091d98516916b081d463c5fad8c457e47
font_01_sfnt_off00011615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11615 11328 bytes
SHA-256: 60f3b5240f8460fb43f98ae39220d8d72af571197fdb0f3510b3a651f9e9e452
font_02_sfnt_off00013d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0F 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90