PDF malware analysis — malicious · db6526e29e320f62

MALICIOUS

PDF

81.3 KB Created: 2021-07-15 17:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: f7aaa4ca4444ad2bb98053b3072aa1b5 SHA-1: 295f504b72f51a2452f89189911793c765c65d41 SHA-256: db6526e29e320f6286da60e16ced31cbdbac1c72c824ea810491e883964e31fc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, directing users to numerous compromised websites. The ClamAV detection and ML classifier further support its malicious nature, identifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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
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://kadh.kr/bobod/upload/file/bapenal.pdf In PDF document text
- http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3094bc284---dewoperilas.pdfIn PDF document text
- http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff3871ee29---mewisimoja.pdfIn PDF document text
- https://b2cexpressdemo.com/userfiles/file/maferej.pdfIn PDF document text
- http://viprealestatebrokers.com/userfiles/files/davunenilovemurirubari.pdfIn PDF document text
- http://cipetbhopal.com/webimg/files/89477641016.pdfIn PDF document text
- http://suncitygroup.ir/basefile/suncitygroupir/files/jabev.pdfIn PDF document text
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/9s7huamgihv7e687qdf43oph2d/77717985877.pdfIn PDF document text
- https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/89e1a7e602aecf0a6f26b7a60d1c0956/14010586339.pdfIn PDF document text
- http://bmhs1964.com/clients/a/ae/ae3b7fe25fc1fd458a9bccd7578bee9c/File/74122509061.pdfIn PDF document text
- http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccac064f7---tufafalese.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c24894adbc2---gazokibil.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afc9635cbc---49676620550.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160854183f0059---55499779576.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/83236398889.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/97567292301.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/243db560d86ba50115b36a233c5f52d3/65792780740.pdfIn PDF document text
- http://dent-pro.cz/pic/file/66673500120.pdfIn PDF document text
- https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/78187a17ddd4497495b9113076320099/gaxodezuvefupirovewi.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/93af20e8bb155f69cc5da32a1be47f81/kataferarugivamipe.pdfIn PDF document text
- http://ronaldtan.nl/images/photo/bazoposevujonaxozupexigub.pdfIn PDF document text
- http://stonebriarranch.com/clients/876969/File/90099857016.pdfIn PDF document text
- https://www.multilandtours.com/assets/ckfinder/userfiles/files/33325207100.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d595e565a1---97789390896.pdfIn PDF document text
- http://hamandeggsclub.com/clients/e/ee/ee862789ee8b59d3f3d22261ccc35c80/File/87893031168.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2514e72b0d---53445488980.pdfIn PDF document text
- https://rajakeempat.com/contents//files/remarutobodaxumetasonuk.pdfIn PDF document text
- http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d6755359c---merefabaxiramu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+conjuring+sub+indoPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- 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_off0000daa2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAA2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f2b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2B9	10676 bytes
SHA-256: `ea66b660c0dc4df3e9882091c9654acf78d57f7752de5b1d83dd81594b9d4bb5`
`font_02_sfnt_off00010ad8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AD8	17096 bytes
SHA-256: `f07dff084a481b45cfd9cae1649c8dee06123e4a4f1e9432932e7e9cfe6fbfe7`

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