PDF malware analysis — malicious · 86f79f709af8e7fc

MALICIOUS

PDF

83.9 KB Created: 2021-09-13 07:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: efd7553b748c5b779b3b9fdd6ead53d3 SHA-1: e4569cc5ead9afb6884400c8968127c79dfa18e6 SHA-256: 86f79f709af8e7fc7949a096af2121a532f813905e573cb6409110be3a1693b0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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 https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1612f02100c02b---1554754340.pdf In PDF document text
- https://kompaspt2.com/contents/files/gixow.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca855d09cd---vokulojixujikitewuxu.pdfIn PDF document text
- https://pasarangroup1.com/contents/files/64703661991.pdfIn PDF document text
- http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d8b6758d---vetetawizete.pdfIn PDF document text
- https://cosanuesa.com/componentes/editor/ckfinder/userfiles/files/62004599178.pdfIn PDF document text
- http://tupnate.com/ckfinder/userfiles/files/90252737344.pdfIn PDF document text
- http://ranch.pl/files/file/82744211126.pdfIn PDF document text
- http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/56530338624.pdfIn PDF document text
- https://grupa-energia.pl/attachments/file/17225067148.pdfIn PDF document text
- https://istanajp.net/contents/files/kemomeb.pdfIn PDF document text
- https://anhhuynoithat.com/asset/files/35840008703.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecc741b5a7---fekezovusobuxilubewiteko.pdfIn PDF document text
- https://value.ae/userfiles/file/17124846975.pdfIn PDF document text
- http://irvinenott.co.uk/ckfinder/userfiles/files/kogasofasawexibuluto.pdfIn PDF document text
- https://skywaynepal.com/userfiles/file/pusozevokolevu.pdfIn PDF document text
- http://eventologia.com/userfiles/files/90864192881.pdfIn PDF document text
- http://exosushi.com/uploads/files/bumuzumaroxogoteluburas.pdfIn PDF document text
- http://thehedgerowchronicles.com/ckfinder/userfiles/files/60522756106.pdfIn PDF document text
- https://ego-sofa.tw/uploads/files/202109011012465015.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/a32dd0b342cb4a133e2a688791b2f4ac/57968930053.pdfIn PDF document text
- https://nhahangthanghuong.com/uploads/files/kuteb.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134bcf6b2b6d---venesoropavoxasedomi.pdfIn PDF document text
- http://northmarking.com/userfiles/files/fajewaranogixipefatavo.pdfIn PDF document text
- https://kede.org/userfiles/file/rerowazotajezujudirote.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=digital+image+processing+2nd+editionPDF 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_off0000e264.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE264	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fa76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA76	17500 bytes
SHA-256: `4c59e60a0f62c48917593a9ce26542dc32f7f23eaa793168ae41bcf65c3c4e11`
`font_02_sfnt_off0001283f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1283F	10980 bytes
SHA-256: `d27f39a99c3d2a6ae6d1751ae5140b64c6a394c61b6abe5e8f2b803f9164e4ba`

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