Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a54186f8a8f9b1…

MALICIOUS

PDF

84.9 KB Created: 2021-09-20 15:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 772ced63bd9823cbb602702c4497a208 SHA-1: fba9abf8f072035ee79ee891daa216e0a50d768c SHA-256: f6a54186f8a8f9b16676a9a4fa26a3758622ba398f2b4a1e1d9d6d56fd023f26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=airlines+manager+tycoon+2020+hack+apk PDF link annotation
    • http://konberdbio.com/upload/files/jitogowoboj.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/nexikadu.pdfIn PDF document text
    • http://dobermanncz.eu/files/kadonojuvefela.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/41378824027.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139becf2b8e4---41355789691.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/kezigu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/7738004658.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/dcc355edbb62a673272c82867e02139e/sexiwemopusononikano.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/26325066661.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/waravinalopajenemazo.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210913140904425.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/xevebiridewupabin.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/61934000947.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/58172597698.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/97462337447.pdfIn PDF document text
    • https://trieurodata.ro/images/file/46606089159.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/xesatizugavegek.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/10634138519.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/rovuketi.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614009f37b144---dadufiziwabexokudisi.pdfIn PDF document text
    • http://195exim.com/datas/files/wobowiwaregiwosi.pdfIn PDF document text
    • https://gdaniec.com/upload/files/diromekekugitatipimudo.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/71571521683.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/84499279628.pdfIn PDF document text
    • http://firegallery.ru/img/upload/digidadedosi.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_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 18388 bytes
SHA-256: 36305bbb2339c9db07d566efd0edc43e01e20b672f51a51096bdc84145b02a80
font_01_sfnt_off0001134e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B65 11248 bytes
SHA-256: 4bbad90810daa58dd327e862558caae0bd37839486d76c944d8e9e187e3396f1

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