PDF malware analysis — malicious · f19e59b8a8f5b18b

MALICIOUS

PDF

445.8 KB Created: 2021-07-06 03:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: afa7515120ce072bb0f3425abe973948 SHA-1: 0ce38cea2321b6541bb25059b979e7e8b9589cbf SHA-256: f19e59b8a8f5b18b42f5e9ffad587b3de92571080a839f16bb748c0b691edf9c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing lure, utilizing a link farm and SEO redirector to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further payloads or conducting phishing attacks. The embedded URLs and compromised CMS upload links are key indicators of this malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.7801

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
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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.
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://thedreaminitiative.org/Content/Admin/uploads/files/92510682639.pdf In PDF document text
- https://sgcaregiver.org/contents/files/98207924895.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/obboviuu0uvbtr5gnl92v8un70/jimubesobopuwomaripakemuz.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4g1a3keo4d3j6jpjdvek2bg10m/26208843318.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dea94bbb7df---99202474080.pdfIn PDF document text
- https://m-isc.com/userfiles/file/zixebasekiwifulokun.pdfIn PDF document text
- http://vizit-k.net/uploads/editor/files/gixafazawowawas.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/7b69f8bc37e2383a4234ffa03686b323/sesiwaxokofogiz.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e3db5061c---dizabegutari.pdfIn PDF document text
- https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/v74ubkl0qnv7fr57jnkos1so8c/jivane.pdfIn PDF document text
- http://mobilesamara.com/img/files/file/97214191865.pdfIn PDF document text
- https://gizaviation.com/uploads/files/93414220450.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb9f88257---39107064007.pdfIn PDF document text
- http://esoftland.com/userfiles/file/gipalapejar.pdfIn PDF document text
- http://trendstyleimage.com/uploads/ckfinder/userfiles/files/23424444902.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/381f1ed3ec82ca6fb6fa46533ab966b9/40570141340.pdfIn PDF document text
- https://ankaratemizlikcim.com/depo/sayfaresim/file/74419429006.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076930c43f36---rumif.pdfIn PDF document text
- http://tcsm62.org/uploads/news/file/pupazur.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082607bc68c3---tobadojazanolutoto.pdfIn PDF document text
- http://apluskleaning.com/admin/images/file/jimemibe.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/lngong1deh3ueq8h6p7qrb3td7/lojijom.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f355d9aa7---fadawetezu.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b6b3a2232---vitunifagewudozopu.pdfIn PDF document text
- https://klcmekatronik.com/ckfinder/userfiles/files/benesujubad.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/98ecb5566f42f762dab101267d9770d0/74852882445.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16076a97a41984---biguvakesaxejizigeve.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c5e4c555a---deribonebevimisenodev.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=kinetic+energy+derivation+class+9thPDF 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_off00067a7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67A7D	23004 bytes
SHA-256: `4b4fce01b56c2f8ca7903c32d11b58207cb3bddef2db7ded98b69ef21cce6901`
`font_01_sfnt_off0006b602.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B602	10988 bytes
SHA-256: `8280603b56f72b0697bd8665291627cb8280def7e7621ec9920729c6d4d40862`
`font_02_sfnt_off0006cf54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6CF54	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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