Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d954a0b65650de…

MALICIOUS

PDF

88.5 KB Created: 2021-07-08 12:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c5bfdba5018709257d29457f6911e75a SHA-1: 69511b788429ab0ba0deb0e8b7a7f87fa520adf8 SHA-256: 34d954a0b65650de96881db08f477cf271dd513d598bf884221c276f8bdf782b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, many of which host other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://dotcomtravelegypt.com/userfiles/files/fitowiparedo.pdf In PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/5tmf76ue9oinmb4mtc0lhqjrk8/gomovejutupo.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5fe63f4e4---gegulepofanuxezusane.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ebc27aeb2---xuduguvenowubukofovatok.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/5a3b910384843d1a7932e18f74dc7591/maxogeliwutawugiwimobon.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/15363c50655011ef267bb25fe8474c0c/63819617940.pdfIn PDF document text
    • http://wawa757.com/uploads/files/41853417703.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/34493302043.pdfIn PDF document text
    • http://benthanhfarm.com/images/uploads/files/saviso.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/volavekurakeda.pdfIn PDF document text
    • https://loctra.net/userfiles/file/gakir.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/rotemokitevulimifovina.pdfIn PDF document text
    • http://congtyvima.com/images/Download/pigisobariletiwelidazizem.pdfIn PDF document text
    • http://newcastlehigh1967-50threunion.com/clients/43248/File/nafexupegominozatilodi.pdfIn PDF document text
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/4b73f8421ca56a565a1e815b4460bbf9/nafizarebapebibofalakub.pdfIn PDF document text
    • http://amandamaitland.com/images/file/60286537352.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/86925922047.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/76737386448.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1mfalsho7cfot12gflb5s13s53/likinixuma.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/n3lgfb7i1t9cs78sh9d05u8m89/jabaxomojesokonuguj.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a98a2f12f---budogigodokoxopaz.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/9af9666b0265d86902d48c87f90fd41f/tiwifozisodenirizuleni.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9f2e8ba53851aef617765c19fefec88c/21969703403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=physical+properties+of+eggPDF 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_off0000f8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BF 10768 bytes
SHA-256: e29b41d5228b17eba9bf79fb28581df650dbc84897a0b4459ca5f96626dd57c4
font_01_sfnt_off000111b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 16596 bytes
SHA-256: 995d3b2c2315cd36ba34ac1efdd951267d24cd00dda9130c884138d939b671a1
font_02_sfnt_off00013caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1