PDF malware analysis — malicious · 6ecb7aad7e283bec

MALICIOUS

PDF

76.6 KB Created: 2021-07-07 16:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: ee00bf4ab42b40c33cdcec99f46c472e SHA-1: b5e8fcdb41e4592aa72482291abf534ba1ab864e SHA-256: 6ecb7aad7e283bec18587a2bda48c3876dd1d50779f27a6fef2e5a3989f66f93

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the nature of the heuristics (compromised CMS upload link farm, SEO disposable link farm) strongly suggest this PDF is used to lure users to malicious or phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9943

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.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/7eab845d5203a0f3911753a230aa855d/66632966469.pdf In PDF document text
- https://allcreaturesinc.com/files/files/58737926313.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e0f8f4c2---refenig.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/53b456d0658a10c2be6573517d0ee7ec/97149446802.pdfIn PDF document text
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/564cdda023e29882d3a7427d1ff2415e/xikegemanutunakedubotu.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16088872fc5676---xozasazabofo.pdfIn PDF document text
- https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/14f77749814b86731ac50ea544f56e34/55928617525.pdfIn PDF document text
- https://cmfnepal.org/userfiles/files/nejakonokelexalaxifawa.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/e607b39c8ab85a421d835dd202704b37/debijadaxuduwu.pdfIn PDF document text
- http://vivaldiskibus.com/FileData/ckfinder/files/20210706_225D53085D157197.pdfIn PDF document text
- http://springbook.no/files/lenotomikuxufom.pdfIn PDF document text
- http://crmrealty360degree.in/userfiles/file/25627325001.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bb6fd6839---49326203456.pdfIn PDF document text
- http://aifamilyreunion.com/clients/59202/File/37339596567.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a627dd3ffbf---guzejudegat.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed5d3cd09---biboreladivawe.pdfIn PDF document text
- http://nutronicltd.com/userfiles/file/wusefirubarukebejemij.pdfIn PDF document text
- https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1a9ba167f57f036ce98c14f29fe65231/desavotagep.pdfIn PDF document text
- https://binarbaidequipment.com/public_html/userfiles/file/xiponirejexusubim.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c2e079edd---12497793097.pdfIn PDF document text
- http://weifong.tw/fckimages/file/fikodipipabosimopevusi.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/t5f9b8mejstdih82qjogmch221/jexowunafaxekafidane.pdfIn PDF document text
- http://instandee.com/Images_upload/files/91894022227.pdfIn PDF document text
- https://foundryindia.org/userfiles/file/roridifa.pdfIn PDF document text
- http://www.majbrno.cz/uploads/files/21740996087.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=cyd+charisse+party+girlPDF 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_off0000c8e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8E5	10716 bytes
SHA-256: `719084b67f3f44bdaf9ec5a0405df9243e9dcdc62f1df0479f79007b00fca36c`
`font_01_sfnt_off0000e178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE178	16768 bytes
SHA-256: `a1e49343a7e2ee5c1b88820b6f266f1b76012f013222c97a6f66db52e1ac8bc3`
`font_02_sfnt_off00010d36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D36	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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