PDF malware analysis — malicious · d5eacdc421137c2b

MALICIOUS

PDF

92.4 KB Created: 2021-07-02 12:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: ecaf7fb4d0ae84b0475fa0f5716ff96a SHA-1: dfc2b4146a445c15043007ad65d2555a1e84fd5a SHA-256: d5eacdc421137c2ba19572827f4d30c863f5024182be5719e939dbcaf97a2e1b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm, directing users to numerous external URLs. Several of these URLs point to compromised WordPress installations, specifically within form upload directories, suggesting a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

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://littlepearlspublishing.in/data/eimages/file/ritujuxaxagagulitowif.pdf In PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/uqdd0u29csasl6hf1nvefu3055/leposilulagafilopiwatomax.pdfIn PDF document text
- http://commune-bourre.com/userfiles/file/vejodij.pdfIn PDF document text
- http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d85368da4---73274284949.pdfIn PDF document text
- http://suapaiatuipelehakefamily.com/clients/80707/File/40276403355.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941efe404de---475800522.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f69537e7f7---zepivunewo.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c64c3a2d767---33161193403.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11843cba0f---8270808667.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875f0f8debf---94138457948.pdfIn PDF document text
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd899eca3---nijudoxilijilen.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607522d74c6a1---37913124799.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/tptstqiiri4tdhmduf7eueml82/86714195028.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/2229782229.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/burirufusokotemasabivinez.pdfIn PDF document text
- https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160996d4986c44---36712196384.pdfIn PDF document text
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716f661cfd5---3937288593.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d242364953---92757141181.pdfIn PDF document text
- http://vejwun.cz/images/88427678127.pdfIn PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/lhiu71hub18l05r4dijs343kgi/34557073117.pdfIn PDF document text
- http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/18918975205.pdfIn PDF document text
- https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/9469f5b10d78ea2ecb7a2cd3e87aaf72/97902182788.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/aa840da3b26497ae38abb208a3f524c9/vogifawakakojuxu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=hola+reply+in+spanishPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee77.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE77	18216 bytes
SHA-256: `6bcf2833cb53fa758bad9714067fd16512b94e9a5429077d355e76a7d0ca0177`
`font_01_sfnt_off00011d49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D49	10356 bytes
SHA-256: `fd88841cb5a379892c84741aba3c73f8df6c12777aa495feac787da87cbb09a2`
`font_02_sfnt_off00013481.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13481	16252 bytes
SHA-256: `bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4`
`font_03_sfnt_off00014a61.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A61	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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