Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee626518dafe8b…

MALICIOUS

PDF

94.0 KB Created: 2021-07-04 01:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b0441d7094f57d095f3daeae4cc50ab7 SHA-1: edf2997a93f78a3f7651a907b6e3213c2d92d370 SHA-256: 0bee626518dafe8b8878d760478ca152551aedc2b1da864a9856ef5d58dbf613
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as a distribution mechanism for further malicious content, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1de23976f---43093387015.pdf
    • http://dfh-consulting.com/userfiles/file/59582697800.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e265b6a4f0---16694450757.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/c83nb790lb7gjnua38vpe00fmn/nogatofegutagodav.pdf
    • https://motodubai.com/uploaded_images/files/99461250035.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609404e177db6---temisetalefabup.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/piethjf0rtp4br4qalodvnnvc5/52608286861.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/afa43494ad12a01a451fb82667986692/30860429460.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/47ac2af6019f20029ac3ee105c0f3a22/pimupidefepepikeko.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/efc501adcfe4b5ed8ca62478918a1740/vikufuburu.pdf
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/39318540222.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/ad9f4ab7068417c39cc9f0852640f8d3/pexibaxelifu.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160af5fe258ee2---velevubituxulumaxip.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc62fe3ff5---20683260734.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf10f7a354---nasulimimolikomag.pdf
    • http://marthomaiticherukole.com/userfiles/file/momefenedosikatalorume.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/l9u0jc67jnaak52k8pnj6fncn2/83827838204.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5cdd0e8398---22560856301.pdf
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/zujibobikovexibiku.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16090daf022c2f---wonibesunexovenoxasa.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cd192762---46565875287.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/e14c70a3ce214681e49969d161eda4f5/33103939026.pdf
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/naputelewomug.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9742ef0a9d7542a0937c537cd1980ec6/85417997817.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=horror+books+to+read+online+for+free
    • 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_off00010d1d.bin
eb24c4f61bddfd46fd8b90e5a4fb3955bbcaab6c4d1471c0ee8ee7d886aab0ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 10572 bytes
font_01_sfnt_off00012547.bin
1362ad4bd8eec3a5a7a95db6d6b1c7351d5c64718ad542a61f1c71c6c4ec9db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12547 17548 bytes
font_02_sfnt_off000152b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x152B9 16792 bytes