Malicious PDF — malware analysis report

Static analysis result for SHA-256 14684386cc82b6ff…

MALICIOUS

PDF

71.6 KB Created: 2021-05-25 19:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 190e372f8f5ab37be5587c7a20e36a50 SHA-1: c2d09674a4b38ed101dc4877adc5d889fada51be SHA-256: 14684386cc82b6ff353bedd5ad77636ae9534302f231055981a4b1da4a05b59f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique commonly used for SEO poisoning or phishing, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary external URL, 'https://zajinet.ru/strik?utm_term=la+se%25C3%25B1ora+fazilet+y+sus+hijas+espa%25C3%25B1ol+latino', suggests a lure related to a specific TV show, likely to entice clicks. ClamAV detection and ML classification further confirm its malicious nature, pointing towards phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=la+se%25C3%25B1ora+fazilet+y+sus+hijas+espa%25C3%25B1ol+latino PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365552/normal_60178785599b1.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/jedatejofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_604f3fc7395e5.pdfIn PDF document text
    • https://kurebefa.weebly.com/uploads/1/3/1/1/131164205/717400.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/mivuxu_faropevatexore_genepoged.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/saxazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_6063f4d18a24e.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/9e27b93.pdfIn PDF document text
    • https://pidumiwululixew.weebly.com/uploads/1/3/4/0/134095913/patomofexig-nagavazedozudu.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/0ee0ebf3.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/276f128c.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/netutafer.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/ranatebobifitawi.pdfIn 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/945da7b8-2fee-4155-89f7-48d4047eac29/75258314774.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/vakuzawuwixotawolukuba.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/blade_and_soul_weapons_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/indesign_templates_flyer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb51c3c8-9a99-4d87-8980-23d7bb0009d1/65899108612.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/platformio_atom_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2735a5-52cc-481e-8e02-cfdab5ece118/honeywell_lynx_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/arabic_english_dictionary_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/27971721219.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/remove_gridlines_in_excel_sheet.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_off0000d708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD708 5368 bytes
SHA-256: adb13e9210b145e08f60912c5db404f895bc2a898b16701f07a27e52207cd9cd
font_01_sfnt_off0000e918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE918 11992 bytes
SHA-256: 056ce702c30e571efbaa1bb189cd52c115064c0e094ec2476eb7edb346af50b5

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