Malicious PDF — malware analysis report

Static analysis result for SHA-256 059cf16ba427562d…

MALICIOUS

PDF

99.9 KB Created: 2021-07-01 00:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f49cd89e8dd8e51a6e3c0ddce740f2b SHA-1: 1003d999154f4fee476785814fe036bc399551ec SHA-256: 059cf16ba427562d955546e58286de428c40f7178430ee9d64cc23c450d4599b
196 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a social engineering attack (ClickFix). The document likely aims to deceive users into running a command, which is a common tactic for downloading and executing further malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 http://esenkardeslerinsaat.com/resimlerfiles/pikataroxotovukew.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8adbbe6d7---nefaneterifute.pdf
    • http://tcihk.com/userfiles/82135815927.pdf
    • http://akicgiyim.com/userfiles/file/nobopar.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/mitetoditu.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d16b97b0a---61057652592.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e4295f599---dorunigojivezebafubu.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/fg5tfhahvgu8j3msvpivbi61p9/nuzilowofefuguvitawom.pdf
    • http://mhinflatable.com/upload/file/77246929359.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1036e877dee6c7ac169bcc2fb929ecdb/33903649008.pdf
    • http://asbufestival.com/uploads/FCK_files/file/92458089541.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e93271ea29ccd408cd8354ff033695ef/mizedirixufilepexolilojes.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/027151efa6da49a22b9d96e8a68918b2/13481174180.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0cdc0d5a---jevakij.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d396a3cabc2---19231252978.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/spn8p2u8nrh8bd0r3fmo0ami91/tenevodegogexuvifujejevoz.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a953cb00899---29673049813.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077524c700c8---jaseratavig.pdf
    • https://tavio.ru/files/file/1868544877.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e212db3e6450e89a3db8fd09ad0c59e8/xinusaf.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607460291594f---56674457053.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a882c94ee---tiditopaja.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160afaacb9592f---74144237217.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=get+rid+of+activate+windows+watermark+2020
    • http://e1pl2.nazwa.pl/busy/fotki/file/wobosilo.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108e9.bin
15bdb3adb90b53ee6cd5e51233e2f89f6d9b6b6fb05eae58b7ed85bed7f2e7cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 11116 bytes
font_01_sfnt_off000122ff.bin
756b691c13b983eafa03e47aa9f0b6ad58d5b72d5a208688d70894321573a878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122FF 16344 bytes
font_02_sfnt_off00013926.bin
99d442c3c7f31364bbeb123bbab108288ae8f676c53dcf70df2abf5a918328f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13926 18248 bytes
font_03_sfnt_off00016972.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16972 16792 bytes

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