Malicious PDF — malware analysis report

Static analysis result for SHA-256 46fa7568104f6381…

MALICIOUS

PDF

181.8 KB Created: 2021-07-01 19:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1f041257fa3e281a70a79490f0ae29a SHA-1: aac210e54c5cc8a52b0e9b0939ea1eb8bb3a42fe SHA-256: 46fa7568104f6381f88f04a4fd288c77b0685177af9ca6da841386693591bce0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, specifically targeting their file upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9631

Heuristics 5

  • 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 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.
  • 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://biomassasia.net/data_ed/userfiles/file/jepikirega.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fea00cc30---jujutaboridedunuru.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3e0a828eb---1454456974.pdf
    • https://whitesal.com/data/images/file/8753_20210519165531.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/cd9e847ee6b4898ee6db1dff33a4f66f/19849723440.pdf
    • https://incoyun.com/calisma2/files/uploads/bibufajag.pdf
    • https://btcauction.vn/hinhanh/file/momovudovawijobuduvokes.pdf
    • https://reparationmobile.net/userfiles/file/99757270487.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0895f8c8b5---nifizikedukawufeni.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/mhgfvbougjhvvhd1cej9qg94l7/wugixevovatakup.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874bffa808e---59107463427.pdf
    • https://ludifrance.fr/userfiles/file/tagasezenemexeluveged.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/c7072bc90f21e162e3517a5e9267990e/jedulobuw.pdf
    • https://naucharts.com/ckfinder/userfiles/files/zumazoxulewubefogopejela.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/19hngs2in9758gl57apbbvac25/pavenakatujezowetesito.pdf
    • http://progfin.pl/userfiles/file/fozanurapevibimalexutu.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/abcc9b015ee0b65f5630dc2df4b8a1cd/tasojenivununezekuno.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb8bf23f6---29816591425.pdf
    • https://service-panev.com/userfiles/27100418812.pdf
    • https://babetravelling.com/ckfinder/userfiles2/files/gexeza.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/612a02cb73a85e3e7fdd82b8eb55bf6c/37803820616.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0ad2969b23053ed012194af89b281c65/31292101298.pdf
    • https://papiratisk.cz/soubory/69913380458.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e4a53233b---sarifelezuvaw.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/8adc934d224c4a08ee5aa1c9faa801ee/katemimonitunepafide.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=surah+of+protection
    • 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
stream_003_off0002465b.bin
22d1aecd9310ac5a68a9546456ea4bd35a13c20cab7bff67e0f9cf3117d5e898
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2465B 34640 bytes
font_00_sfnt_off00022e67.bin
91d983d23b397f06a24e1623f0596629da51745ec635d65b344656b0997f5e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x22E67 10536 bytes
font_02_sfnt_off000282cf.bin
8d41ae8ca1a131cb9f3da97a21a1cf365dd1f155448efa8e216d7000f16aef50
pdf-font-stream PDF embedded font (sfnt) at offset 0x282CF 17328 bytes
font_03_sfnt_off0002afe8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFE8 16792 bytes