PDF malware analysis — malicious · db465b6ad82d4468

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 18:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 1b01812a9b9c88e1420a3957f11e2b6e SHA-1: de32d33dfeb098a8016b12a70d9e63edc981f417 SHA-256: db465b6ad82d4468513c3e2559f89275fbc9de3030984b3f2df48b3ea0a323fd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of numerous external URLs and the overall detection profile point to a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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 https://allytemp.ru/uplcv?utm_term=dr+amit+javed PDF link annotation
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/27888288000e7df04c3e88df6ccca4d9/58860538886.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/9d85be16dd3a1f88df15d2d4cf2cf0e5/37154532638.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093bcfca9611---20834443513.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/352ece1b2f3cfcf514313531e34e3eca/3535313185.pdfIn PDF document text
- https://soechi.id/userfiles/file/80978312513.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf190a3118---29115435700.pdfIn PDF document text
- http://tcihk.com/userfiles/14876574367.pdfIn PDF document text
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b64a559ad5c---25365692454.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8215e5066c75e52497725b1c21a0bc06/82335314720.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6306d657e7930c40d457af54be4600ba/47649297819.pdfIn PDF document text
- http://sequirk.ie/userfiles/file/61232738569.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923fe425b40---lagufagutategevepanafox.pdfIn PDF document text
- http://akgikorea.com/file_upload/fck_upfile/file/nabarer.pdfIn PDF document text
- https://grandhotelbulgaria.com/userfiles/file/xoxituperagopuxu.pdfIn PDF document text
- https://pametnidom.hr/pametne_kuce/userfiles/file/97035256896.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-6/file/digukaxapajewoxujakuxu.pdfIn PDF document text
- http://tipiland.net/upload/file/gegerilikalakod.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0095f3ec2---70313683509.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d870592cf3---vibozubuzuborenubedijus.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cfb0eaa01---4784915379.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc8dfe0e31---kabozasewijitudo.pdfIn PDF document text
- https://etcbt.com/userfiles/file/76027386628.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070345d19d32---peraxilaxujamuxipejes.pdfIn PDF document text
- http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/sidiwiserulelifuf.pdfIn PDF document text
- 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_off0000d6aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6AA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eebc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEBC	16864 bytes
SHA-256: `cf205d7b2d7389df1c0fd5331428c8210c695581a76670f71e5b4977b62d25c6`
`font_02_sfnt_off00011a3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A3E	10168 bytes
SHA-256: `b7ae299630653a9f6895b87fcf338a5f56e68c7e885a1857253b4ad177e21781`

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