Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a96f740c87ef101…

MALICIOUS

PDF

76.9 KB Created: 2021-07-02 13:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0e2be0572151cf5263b888ed5cb767c SHA-1: eaea912fec7fd16108a7a7ec4fe4f02575952e91 SHA-256: 1a96f740c87ef10113e66ee11780260b198dbf3df3ef6dcc16f2ce39a6b29699
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2dbf29ff5---87179103413.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4a5af397e56eb86d682651b5270471cb/71894257019.pdf
    • https://invest.pl/userfiles/file/10589692040.pdf
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/69368546564.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b88c73e960---jolawebekajapesapepeli.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098454bcb9fa---66239504869.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a961f3d38515024f59d38ebd871ea3ce/14925911009.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/354d668ae02c55e86eb37970a5846029/91032223748.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae051b9e33e---tixigenujokajusomekinak.pdf
    • http://security-m.jp/tool/images/file/relativizoworifasemis.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/0b68f5eeeb53856254e334b6db4d2f9c/nofelisamuwalox.pdf
    • http://xedaptheduc.net/app/webroot/uploads/files/tivoxuniriwofetenod.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/mqgv7okjoimcon2p526j0h9cl5/20026795016.pdf
    • http://easternsheep.by/app/upload/file/26386810742.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a4e711c9c---35897846377.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727d80a0dc---64649335432.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/3fae5829ba49f3020d82ef76bfcf3f56/45283175453.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/b01c5c9f3421313816d1fbbb781d10f4/zuwazoj.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fdfbb87aa---3093708819.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rfprp53p8r4d5df0p2lieops06/jalena.pdf
    • https://newtech-utm.pl/userfiles/file/niginawitixujozagulomoxi.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cba390ddc.pdf
    • http://mintaialuminum.com/d/files/2019502166.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c0cecbe6b---90866918413.pdf
    • http://tinnaduraflex.com/uploads/files/wizematizazefizowajo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=features+of+a+pie+chart
    • 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_off0000cabb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCABB 16792 bytes
font_01_sfnt_off0000e2d2.bin
a02d9183fe862cc0eaf704354c5af197a77ad8690a7bde9cf60d5bc79e2053e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 10504 bytes
font_02_sfnt_off0000fad7.bin
0f735512ec114148ed0fd2bea517117f56970f5a76f0961fb3263aa53ac26709		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 16768 bytes

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