Malicious PDF — malware analysis report

Static analysis result for SHA-256 baab2c744c150a58…

MALICIOUS

PDF

83.6 KB Created: 2021-07-01 15:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88e65910ae9bf9e51f72d22b0115792f SHA-1: 6d5f865a034eb855c02063c68d37379717d879cc SHA-256: baab2c744c150a58b40f8bd5a40538dedc471b62cfab6d5d8464a0ae680c193e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to various websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609239b9aee47---furewamewakinipexulolamo.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9081ba9e93171833f0e7141a136676c/dotekizajotasuta.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3d853249a557b783777ba0b2edfa54b4/sizodibupe.pdf
    • http://elsekmont.eu/userfiles/file/13652333817.pdf
    • http://onlineexpert.in/userfiles/file/89582645045.pdf
    • https://atphp.ch/userfiles/file/nolet.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/zutofifevinom.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c25990d3786a010eb4922f156bed214/tijitirelokuwu.pdf
    • http://abwmarlboropike.com/uploads/files/rurimudegowemawolefoj.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/89a468c6fc1f4fde70c4e56976a00487/38189814176.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/getimigizibepura.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3d4e23f07---5768808448.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892627ca969---48058215655.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc43156854---bovevibigikenuremegexigu.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/tijuwagozu.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccc015e3fc---damizepurerebesufizig.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/bc9ac9d5cc487bf21ddbc7ed2643c2bb/8588168015.pdf
    • http://asustainable.com/global/file/4977855437.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ecbb014a5---watojewuwaji.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609340101cec5---39513294975.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae39a94a417---femudukederibuj.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/498389487ad4e0abd48062d0fa73b5df/95273430746.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/c5fc1e31bd1c9bbf29c0917099907397/92292734764.pdf
    • http://alnadaoil.com/userfiles/file/motikikewawomafowepeja.pdf
    • http://bjaimama.com/data/upload/2021/05/file/202105231519202152.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606efbe4e6a7d---83647025149.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/q0pqu99v9vimai0kbuofol5ond/pesajamugewogivojixave.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=biggest+song+of+2019
    • 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_off0000e2fa.bin
da8a507a6134c3b63984c5c4efa541307350b32c3d805223b7fd1cc06a16e73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 16956 bytes
font_01_sfnt_off00010f53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 16792 bytes
font_02_sfnt_off0001276a.bin
468c1f9f2507a3a21bfb0af9f94d0fadb7be815c2df1dda184019eb15e97e9bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1276A 10596 bytes

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