PDF malware analysis — malicious · 4614cfe41024ecd0

MALICIOUS

PDF

75.0 KB Created: 2021-07-01 15:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2c3728bbac9a8c1927cdc8f56fe9b724 SHA-1: 1ad49e5a35d70f946826f6afe0f050741600e48b SHA-256: 4614cfe41024ecd0ecd588b3d1a70feb98ce7c58c9a78525337cebf949f22c46

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is detected as a PDF phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristic firings indicate an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier suspicious score 0.2818

Heuristics 6

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.
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609031bc787e6---bakixugebepuxizoli.pdf In PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a09392e4b60---bebarilofukidinogife.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607de35fd85f1---3295662801.pdfIn PDF document text
- https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/54rc2gvkc7jf67fhuj91u1358t/9082704324.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/87d05e81120768d66c5ab6f21a60726b/wivemegezozalaliwexudal.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16098545d4f6c6---60735133137.pdfIn PDF document text
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b0bd65208---24951135707.pdfIn PDF document text
- http://mertlakustika.cz/images/pages/file/54967458707.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c63f2e7297ed82b526ed04fa91d20229/fimasuludoruvujamof.pdfIn PDF document text
- http://albino-pitti.com/pub_img/file/10025432096.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c666d7fc2---nuwalojezazadamosujarago.pdfIn PDF document text
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70d48aa3f---wefevin.pdfIn PDF document text
- http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608413692c640---bulumobafenut.pdfIn PDF document text
- http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/bufijit.pdfIn PDF document text
- https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/5ur9vn7mtgghvckg6dfubpek7i/17793369933.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16089777935da7---lupem.pdfIn PDF document text
- https://danielstrehlau.com/userfiles/file/92685057759.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c489bcc3654---sazepumugelojutiw.pdfIn PDF document text
- http://koszyczarek.pl/userfiles/file/pawaf.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d333382e18---99416564470.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807f1384b06---33668064605.pdfIn PDF document text
- http://ilovegabal.net/fckeditor/_upload/file/382485805.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160826d53278c8---pijopamazuseviranajex.pdfIn PDF document text
- https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/71af154866459904a2814e7c203092ab/72526913626.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=listening+practice+test+pdf+with+audioPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d04d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD04D	16720 bytes
SHA-256: `60d502beb7917447d1e6f660cb74356a145f3e0d24b06c884768950623892a16`
`font_01_sfnt_off0000fb82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB82	10996 bytes
SHA-256: `65cfe84e7fd25fdfbba2e581a63ed7162e9630b4754ebc8befc69db7ff8773d4`
`font_02_sfnt_off000114e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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