Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb4ae2447ee85e7…

MALICIOUS

PDF

94.9 KB Created: 2021-07-07 01:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 02e5a7a1f932607fc12ff84c7cbefc2e SHA-1: 71fcde547d666578f167a43a9fc1440d88e3edb9 SHA-256: beb4ae2447ee85e78f30a2286ac2f501014153cd0af65af2210110407ec72629
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to phishing or malware download pages. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=highest+common+factor+of+96+and+108 PDF link annotation
    • http://vtaky.sk/media/file/vaxopigedaxubaxosumu.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/32284811922.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070ee97e29cb---saxekovomo.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ce2514ee3---67175237148.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/7264cf5ffeb35ab35dc55fe930f05a84/4922815375.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076907bbb72d---mesokaruwazalofetawos.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/babazuloferorupafuwa.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b7da3240a---33620898088.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/jgl1a8o080b23q3s394339algm/52254532324.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/72722396308.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68e28156b8---zenoxujubaduwojubifop.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f33289e7966df3cbdae75b370e6f219f/ledajewefonolapejilinim.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea608917a9---rowuweriwi.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/87548604468.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/rawok.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/1hhv4m3h6v2kna19kn475ocde0/10371077360.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bbb0829b7ef28ed9c98e7a45565c7b5f/74260814034.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/sopedono.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c511ef697e2---34746896078.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/i8ja0naboq1emjn0ljeh0nrdo5/33070154543.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/93c4a54da25756b6168cac3a7aa124f1/ganesefujurigazasona.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/172fef3b2b540ecb08b67ac31a9bfc82/xekabi.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/19dca4ff38795a526c18432fbea87fbd/kugosa.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/xelojoxonavirazapuxun.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_off00010b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B82 11588 bytes
SHA-256: 189f7d4e15789a471b8d0a45328f729ae250a5a036ee9cfee5517f7896ef241f
font_01_sfnt_off00012694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12694 18076 bytes
SHA-256: 2a02a845d0a0987af7ae68164469c6615d708070fded320d4934b46bdea79cf6
font_02_sfnt_off00015639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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