Malicious PDF — malware analysis report

Static analysis result for SHA-256 62610deb8a65722a…

MALICIOUS

PDF

76.4 KB Created: 2021-04-05 16:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a4b73036bdcd1d01ebedeb9e9ca04d1 SHA-1: dd330c0ea832d2a1a40c8dac050b2718671c9bcd SHA-256: 62610deb8a65722a1a97246cbf12901e821f0495bc54a1c0f9a2d25418f518ad
186 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 0.9990

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://bologen.ru/strik?utm_term=what+is+my+zip+code+israel PDF link annotation
    • http://reawont.online/zevagujevuxokill7qqx.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/8419574.pdfIn PDF document text
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/c514abffb4a7ed.pdfIn PDF document text
    • http://hihikane.space/aconitum_napellus_30ch_como_tomarjz58b.pdfIn PDF document text
    • https://gubagomokugexat.weebly.com/uploads/1/3/3/9/133988684/ce5cecd9ab7c58.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/e2fe77104b3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3abcc933-4059-444f-8e65-7077e95f005f.filesusr.com/ugd/44645f_061e7ac174e44162b10ec03c35adf520.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/xusovitezopufexeze.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/pafozosasura.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_85aec0607b5f4a45ba634e8ab1f56e86.pdf?index=trueIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_c4aa057c8a05428ea65c676185d3fd15.pdf?index=trueIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_bf66e1167ded45b5afea76344de2ff3d.pdf?index=trueIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_8a4613f0f498400ebcdf65e844a07b40.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_0bd4f2cd18cb48e09c10b1f189f107bc.pdf?index=trueIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_824f24b6f2fc45c6ac394e4534db611a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tosego/97785510516.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_866b6e08c182488baef39d45b97ff0d8.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_9815f1b8dbf346b694274e6794909827.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_2556d646a0684cff8ae9883c75448d40.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_f75028b96898433685417d20f235f170.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_4be91d2a3ecd4fa1b2aafc1b524d01fd.pdf?index=trueIn PDF document text
    • https://db244590-af71-4c33-bd6e-2f8f55f31281.filesusr.com/ugd/fdab61_a2572b3353a74a2dbbebf1c389c3f9fa.pdf?index=trueIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_4d8d8a533d734e11bd86063f0b3280ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/fixorewerobub.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_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 5476 bytes
SHA-256: 5b15957f1554b4dc96a559e8f31268e66d35ab884c5585553382254ffe9e2042
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 10632 bytes
SHA-256: c1de37f4bb8798bca3b0543469fe442fcb1ab31c91e2e9f73e6e49f35ad09e38