Malicious PDF — malware analysis report

Static analysis result for SHA-256 032f7a307ceeeec0…

MALICIOUS

PDF

82.9 KB Created: 2021-09-11 08:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: cc0cbca3e5acbb9cf87dae56bd71d28a SHA-1: 09d24645b1feaec81fbc9dab3a9639c290fba5ce SHA-256: 032f7a307ceeeec0b35e001070e6f80f59c6d2fa8ad1d8650f8174e8b4fc0d1c
126 Risk Score

Malware Insights

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

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 0.9917

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 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://123natura.com/stockages/files/81000386051.pdf In PDF document text
    • http://evolutionchonburi.com/userfiles/files/31303073016.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/vumijota.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/65090473553.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/84568672595.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/fefitusepanorevaj.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/70739005988.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/tinugozekotosewetubaxirez.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/34769417333.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/koguzovoniwosakatuxodesu.pdfIn PDF document text
    • https://forssh.com/userfiles/file/kowugukitemujimidusokuf.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/jebapegedun.pdfIn PDF document text
    • http://zubrcup.by/files/files/bedusasasuxawuruguwi.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/52350548776.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/wekifagekudowubafumelix.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/1908563910.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///rikoko.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/94141135710.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/forizoluborisisedipix.pdfIn PDF document text
    • https://krusomying.com/data/file/789754462.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/38299344255.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/gexixomubawuradebifikim.pdfIn PDF document text
    • https://coevent.ru/upload/files/jejuzedutipige.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/85339363395.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/toxopivilefares.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/96369945429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=harry+potter+and+the+philosopher%27s+stone+mp3PDF link annotation
    • 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://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_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 18676 bytes
SHA-256: 43decfce3699c0ce6891fc02833f19129554cae1b7eb1db538fabb5239845cda
font_01_sfnt_off00010bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F4 10968 bytes
SHA-256: 88e0a7f964c798f4c4a34d6a47f3e6ccc6c7047fc3248abdd936b4255d0735f3

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