PDF malware analysis — malicious · 8a7828d1d9efb109

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 13:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 240252083bba3ce404097521f70e4eb4 SHA-1: c4dc8450369cb8684684e02f5d7227955d36d247 SHA-256: 8a7828d1d9efb109a3ef920c7402830038ac12ec485ffbea037802bc12c1dddd

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 document contains a link farm directing users to various websites, some of which are hosted on compromised CMS upload directories, indicating a phishing or redirection attempt. The presence of numerous external URIs and compromised CMS upload links suggests an effort to lure users to malicious destinations.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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://www.annaleehuber.com/content_files/file/65735263880.pdf In PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/606d8338f618793273f76eb71cf5ca51/28367237216.pdfIn PDF document text
- http://zussobrance.sk/grafika/dokumenty/2001659058.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0602715f4---58976491095.pdfIn PDF document text
- http://www.rotudavid.com/ckfinder/userfiles/files/32718619134.pdfIn PDF document text
- http://altaprecision.com/userfiles/file/1498315870.pdfIn PDF document text
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0dd4aff32987e0330564843306c87c47/wilawugikimapovenunomizan.pdfIn PDF document text
- http://imcborivali.org/userfiles/file/14692525955.pdfIn PDF document text
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/dmdjj7s01eir7c53c30g2m6qi4/52895842122.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/xarekawef.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092df3bc619a---41286099171.pdfIn PDF document text
- https://epiphanych.com/images/file/tilozulukepavamorekowof.pdfIn PDF document text
- https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/c8b10c29eabd89f5c0390243922bc8f9/figifudefu.pdfIn PDF document text
- http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/bca7e96ced2f9249f6f3b4f7fdfaccdc/27451440019.pdfIn PDF document text
- http://kulturazebrak.cz/userfiles/demajuxakepadiraji.pdfIn PDF document text
- https://daaeportrett.no/upload/file/75689652703.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9ba9a662---pamuvakumavebobepow.pdfIn PDF document text
- http://dwhs79.com/clients/15834/File/wesarexu.pdfIn PDF document text
- http://www.haztartasigepszakuzlet.hu/pics/file/sivagedefukeru.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ottt5tibht54gnoel83pr6nmj2/96085259283.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91cd07dbeb---telibabifimewejumobuf.pdfIn PDF document text
- http://fruhmann-elektrotechnik.at/35497154711.pdfIn PDF document text
- http://heyumpnd.com/userfiles/file///14367424678.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/q0bvbmesd7d5kv2unfgvbmsbaf/fakifolorosunit.pdfIn PDF document text
- http://savoie-outils-coupants.com/ckfinder/userfiles/files/fimemojekixu.pdfIn PDF document text
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb73ce60bb---mobimepuxiwemoto.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+increase+arm+girthPDF 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_off0000fe23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE23	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001163a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1163A	10708 bytes
SHA-256: `5b3e57f431d734440979d2f257caf9640624b496a38f828e80b7dfd11f62f76c`
`font_02_sfnt_off00012eac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EAC	16804 bytes
SHA-256: `f4801868de3fedb748e500bbdb684bc59f876168bb152b5440bb62b44074cb9c`

Open this report in the interactive analyzer, or submit your own file for analysis.