Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccea2c4e1b378171…

MALICIOUS

PDF

82.1 KB Created: 2021-09-11 01:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: c811695e98a4b5294f0b222166d279fd SHA-1: 53c61554d8f96a03a2d0d5a4b723b4ebf80daae3 SHA-256: ccea2c4e1b3781714def51610d50cdd4f1716f945e1184e018062d0b3600f2b7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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://archism.ru/uplcv?utm_term=how+to+display+hidden+apps+on+android PDF link annotation
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/liroronefibijuwaduzogal.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/bagemojokomopanare.pdfIn PDF document text
    • http://unityproductions.com/upload/files/21631194803.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/bigipapanux.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/zarasipologoxanapigenugu.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/sosedaxi.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/09/file/202109090726031388.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/tudewedupezuwiraxuzadeken.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/16876447473.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/kugilagemigojazeto.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/bedamozuzukalojigagopok.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/jufavobepudob.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/51106848331.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/fevowuvavoxutosopigelem.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/rigabafisex.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/90491004757.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161304d5c458db---72131267879.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/23773524163.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613437c5d636d---26849347625.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/lamivalotemepogetebajodo.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/bagaxixoxuzuwivofotakebud.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/woxajepafinobaridudu.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/58961065243.pdfIn PDF document text
    • http://kmsenior.org/file/files/lobuwifafikudixezitokuki.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/50059513330.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://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_off0000d81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 19476 bytes
SHA-256: 103427fcbe6ef187f6dd5657f33fa7f1a42ed88764b0e6318d0ee5a1c8e20b7f
font_01_sfnt_off00010a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 10680 bytes
SHA-256: cbccedea848281f3c1feffcb57e6406b781bfcecde4372c8f4cec7e623247e95
font_02_sfnt_off000122ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1