PDF malware analysis — malicious · b2f99d7b3a38e47a

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 06:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: c6dddd57b6ba86a206d5c3bd6e5c29b9 SHA-1: ca2718c8154ebf25cb0de112646947804c2da8c4 SHA-256: b2f99d7b3a38e47aa1c6d6240011ed99844ca70fbb3ac7b1eec2aadd0642e620

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9881

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://grawerlik.pl/userfiles/file/muzejonekefuboluzek.pdf In PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/0569fdb2ff9e767b08c0da4acf86d5fb/6041228078.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872e8b50563---bezixenezukewanufevumef.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607078f84b2c0---banigutefituluzam.pdfIn PDF document text
- https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/b12c2e59c3ff203bbc6ae6c68624bfca/bowidugaredutegen.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a5507cd8e---33138273944.pdfIn PDF document text
- https://rachelrom.com/rescontent/file/49959080284.pdfIn PDF document text
- http://tksvolga.ru/userfiles/file/89975160768.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c000a2eca55e52e496f70e056cc0639/561835720.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/40bff14a429b5f828743c5b498b7b24a/nogerebotorejovobogonigi.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/21470fde867c2395718b5f6d9c574a03/pepotavewamikowalofun.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/foc7vir2d69jh4hfob9p0l0qis/xosotezuwemibofusi.pdfIn PDF document text
- https://asiabiru.com/contents//files/voginulo.pdfIn PDF document text
- https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a71767695---9832677829.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/pgc0srhvv2aoulfl4ugikhpfo7/51318500116.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5889a0ccd---87195724376.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/t2af3iqpjn34748s0qo81h3gj8/4156314540.pdfIn PDF document text
- http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ecb4b4da1---bavasaredute.pdfIn PDF document text
- http://asesorgubernamental.com/images/file/pepimawikijegusuti.pdfIn PDF document text
- http://shreejians.com/userfiles/file/pukepipuligidopifo.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa33efecc---pawuwufonitaxizetadaw.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/40a2cb91208f4f1d14b9bbcb43a1bd0d/wowiwi.pdfIn PDF document text
- http://karinameal.com/imgdish/files/tubatu.pdfIn PDF document text
- https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/193cea8112d6ca86504c206975d3cf54/5628342971.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a035dacde2---favegarad.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=rage+rage+rage+against+the+dying+of+the+light+meaningPDF 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://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_off0000f12c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF12C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010943.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10943	10960 bytes
SHA-256: `9af552870210b486e8d13451106202d439a8f69ec30560a6ba4fa47e8cbe1a3e`
`font_02_sfnt_off00012246.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12246	16984 bytes
SHA-256: `d80f8f71720cdef6e09757badbab7d2966ea304387aa554be3bb2346e59de5a1`

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