Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac95837b283950f0…

MALICIOUS

PDF

177.5 KB Created: 2021-07-04 01:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa5819514b1fec104dcd0668ad905417 SHA-1: f2027734bbf63b49f95bf10a57e23712e9d40f12 SHA-256: ac95837b283950f08f371b16f882be9140acc922a75553bd0f24ab971f522e60
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb9f6ad890---riribisamisel.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/39401451329.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/bd605f2895aa84ec4e8b1e9636ca44f2/ximipow.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/315628aa1510dac343dcf8b2eb7ff78d/bumubukev.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/eqook4u39aan4glmgj10k74ne0/tepefegediwejenavove.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bb82a8bac---sewokimenigav.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17dd195466---32569506923.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609534aab7132---tagulokavomulepifewapowa.pdf
    • http://4bx.pl/public/file/tatero.pdf
    • http://ebiocell.com/uploadfile/file///2021060202554442.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/434da64161abafd36babb3ce0600d9e2/pulojowanugufiwedizoguvol.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/12ca133cfffcb917a8fb22e1f8bace1a/nopirusujasokamuju.pdf
    • https://astek-telem.fr/userfiles/file/mutelokovezemus.pdf
    • http://shqinze.net/admin/upimg/file///jisasuxanijatiware.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afc631d4e3---4819920129.pdf
    • http://thedewakohchang.com/image/upload/File/8154175839.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/r10gnh2pvdq86posdcghs1j1nj/fusozudotoxupuveveraji.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/1ea1a4bf5896751897d42942861878c3/53977747285.pdf
    • http://idolyokocho.com/js/ckfinder/userfiles/files/2069929434.pdf
    • http://waberry1969.com/clients/877040/File/bodegeluwarixum.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f19c9c2f---3549887883.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f6036be5---zebisoge.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3af1c98f5---fepomajuzagi.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/55ossusui05l0of1ploejjbg93/57889837961.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=photoshop+2018+crack+free+download
    • 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_off00012f41.bin
7259ac43d44697572c84a458df3e439f9217859fdba1ef50a2b800c14417f95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F41 119896 bytes
font_01_sfnt_off000256a3.bin
45aa1bd0d7bc168149f7ac4b64498684d0b65dec39aaa94c297aebb00e80ffe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x256A3 17628 bytes
font_02_sfnt_off0002854d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2854D 16792 bytes
font_03_sfnt_off00029d64.bin
e99f15a51cce059b781ecb58a7cb8e6a12ca3e03bcf12085819f8f6bd5675dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29D64 11308 bytes

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