PDF malware analysis — malicious · 94018dddf8f242ea

MALICIOUS

PDF

92.1 KB Created: 2021-07-21 14:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: b5e06d8c255abe52b6b5aa38dea75f1c SHA-1: 1de016143b72a7639b8edf85526e0cca1f1f38bb SHA-256: 94018dddf8f242eacd8a2533cf5a11a044f2d1f8edaed12f6204e59e091fd8dd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous PDFs hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of numerous external links and the high confidence verdict indicate a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://albino-pitti.com/pub_img/file/59932051495.pdf In PDF document text
- https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/41104da8bd37efa7b5cef80df747399b/putepudiro.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dee91dbd064---jenevivejofavipimisijo.pdfIn PDF document text
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/ehqktm1u72u2vmflna5ojc0449/pibeseduwuforofedodo.pdfIn PDF document text
- https://bistakalikotenetwork.com/userfiles/file/37751380071.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/4sgv7igsjp4rdojiv2s790ro4q/37536191310.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/rodiwasufamosafelefolave.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e26d77b7e19---moritubokebi.pdfIn PDF document text
- https://twinslock.com/ckfinder/userfiles/files/sowebunuzuweforev.pdfIn PDF document text
- http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa4009922---nojipuka.pdfIn PDF document text
- http://malabarisproducoes.com/arquivos/files/zukipuwuwoxerazotufupex.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/edee0e8714b67f91e860c8a3782e9977/tipiwutebadovoka.pdfIn PDF document text
- http://myphamasia.net/upload/files/46214779245.pdfIn PDF document text
- http://broadgatecapital.com/userfiles/file/56524125247.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608254fd9cc44---62864339700.pdfIn PDF document text
- http://onishi-kyosendo.jp/archive/magabaxitaro.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2492090d7c---moworapem.pdfIn PDF document text
- http://pspectr.ru/userfiles/file/31560508262.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f7b933fd0---97575313221.pdfIn PDF document text
- https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9321a195ff---wajizinaxiru.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9483d6e48b---puregub.pdfIn PDF document text
- http://jjinline.org/file_upload/file/43609890118.pdfIn PDF document text
- http://zpb-maciejewski.pl/upload/fck/file/2101571257.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/lunomipegipovomujizufikiw.pdfIn PDF document text
- https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/3b8c8a42ec48dd5da9821fb64d91c294/dijunapukutuburif.pdfIn PDF document text
- http://bunny888.com/ckfinder/userfiles/files/55326230295.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e94d313797---zemopipejorakigema.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pictures+of+cartoon+dog+horrorPDF 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_off000104c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104C4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011cd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CD6	17240 bytes
SHA-256: `4dae418fdc70769b1f98f29180ed1b0270c0102df4778287a68ce82e560718e3`
`font_02_sfnt_off00014a1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A1A	10808 bytes
SHA-256: `09c83971be1172e5f55b376e848321a3c99e7a2a01f9a640c493edccc4aa83e2`

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