Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0e1b761f49880f…

MALICIOUS

PDF

90.2 KB Created: 2021-05-08 08:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 87621d29c83baf7e7f6047b73728408d SHA-1: 53eadda2639e3d9d14aac2ea069a3a6aa385473c SHA-256: 0c0e1b761f49880f7157cabac407341e3221bd9450b345bdd56abaf246c73cba
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 0.9996

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://jottigo.ru/strik?utm_term=is+there+a+lifetime+warranty+on+lazy+boy+recliners PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fcd18ad66e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_601bf9b6a4345.pdfIn PDF document text
    • https://rovewavulitomu.weebly.com/uploads/1/3/0/8/130873995/debosifapigowa-lusotubasipoge-xafuka.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/0e478d.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/95e298.pdfIn PDF document text
    • https://wozomeki.weebly.com/uploads/1/3/0/7/130776066/novigemar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_604e3dc0649d4.pdfIn PDF document text
    • http://fomoregekamikat.mypressonline.com/23348957821.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/jutiwav-zisowokasex.pdfIn PDF document text
    • https://dunexekexafu.weebly.com/uploads/1/3/4/6/134622254/e48cfc2cbe79bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426954/normal_5fd78e105ac70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6030caaf3adec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_6033f811396e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_6052b34d5c30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_6050702366ac1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/70069b04-3094-4958-9716-b84972d55edf/tipos_de_sistema_operativo_windows_caracteristicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9e1547-766c-402e-be7d-5129bf141018/pezitemefalabikixugavug.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/lg_l39c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fa67bc-8e25-4a8a-9965-ded3a49eb3c6/hp_8620_printhead_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d49ae9-9603-4146-9e71-cf001ecd9369/96013202489.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 5232 bytes
SHA-256: 05c4639100ca335d50bed30539725b9c0d387cef5634384f1491c11436f619e4
font_01_sfnt_off00010e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1E 11220 bytes
SHA-256: c6c0dac031c57fcaabad3257663d42b61bc444d52722721fd05282e68face5df
font_02_sfnt_off0001348f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348F 16392 bytes
SHA-256: e7de505aa71f1695259460d29c158076425155562d7d4271524d869abc4b0cbf
font_03_sfnt_off00014aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3