Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fda155ef27d5b5f…

MALICIOUS

PDF

90.6 KB Created: 2021-06-29 09:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 857961a68c5955605871816c84d7c031 SHA-1: f32a4e505326f2e3c22c0382b65aa06cff915d98 SHA-256: 0fda155ef27d5b5f184fde893fbe1a373a87b813bae66a6f0e09e32a0cada039
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting domains, designed to lure users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://condominiobrisasdelnorte.com/userfiles/file/wogisa.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/r9e7oepfo6fcgmjqibkihvjjv6/42448549929.pdf
    • http://ms-krmelin.cz/app/webroot/files/files/ledejo.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/dbd9b830af0256a9b97a312dc19af0cb/7612360739.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609417fc702d8---wulibuzitelisuzemagesazo.pdf
    • http://comp-art.ru/userfiles/file/rilepitajipavuwirajudoj.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/aa19eac0ce26437dc1f0a5983feb5392/81884401565.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac8ac4dd59---74117664763.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0e6a41e3e---kevorasowezanudugilit.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160728e7746b09---38525057549.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d54093bae---37881162227.pdf
    • https://lotteppta.com/beta/assets/file/kataxokuwemaforanuj.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f421b883b8---46794267284.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ejvt6j7rb0nn4i9dmc4u1lu481/14892419667.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090d4144da07---sorosowiguwobutawozuxen.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e999b07afd55dcba74640fdaaf48d09/49150512124.pdf
    • https://baobihungphu.com/media/ftp/file/75082405621.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecd7577793---bigasoru.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/15193830caf789321362c422b37893d9/66383115020.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160858a7a8c58f---94955087679.pdf
    • http://classicalgardenstatues.com/uplds/file/97462615644.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/49b26a0e75a08be0ba63b5d70c97fa22/72309848804.pdf
    • http://daikinhbac.com/upload/files/xuvirejujemosoxutume.pdf
    • http://balone.net/_upload/file///lovibalomupakadakaj.pdf
    • http://au-zlato.sk/upload/files/81426013087.pdf
    • http://watdoenwevandaag.nl/upload/vejixiwufobizi.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5e0ddab1a---xakusojetubusot.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/bv9oqobknh40chpathbllml7a0/rasutinine.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=i+can+feel+other+people%27s+emotions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101CA 16792 bytes
font_01_sfnt_off000119e1.bin
9bb959ecbe8d0a53d69ed1948c3aa43cfee0bb93f30b39b895c8ef925fb9cb6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E1 10732 bytes
font_02_sfnt_off00013260.bin
4fa94fdbe2d5041a280fb7bec498c151c5320f1603dc6f4d76919b0fdafa8bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13260 16408 bytes

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