PDF malware analysis — malicious · e22d2a1ba31c8628

MALICIOUS

PDF

83.5 KB Created: 2021-09-06 16:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 9b2b924b50c2302ef679b92f770a0d6b SHA-1: e1d1a7950eaaf295e930ff428d82b6b428f6d386 SHA-256: e22d2a1ba31c86284e1ee04b9dfedadc50d07752255729fe0926fc45a17eb308

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://laborke.ru/uplcv?utm_term=cours+d%27ingenieur+genie+civil+en+pdf PDF link annotation
- http://clairvoyantinfotech.com/demo/images/18355556640.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/75nguj7vt99c2r72hkuvdt5f45/53856660861.pdfIn PDF document text
- http://orthodoxvaidikasanghom.org/userfiles/file/xekotusemerivasemogi.pdfIn PDF document text
- https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9f2cee840cec9138e772e48c47af6b78/7824322967.pdfIn PDF document text
- https://mgogs.com/mgfiles/file/7622118004.pdfIn PDF document text
- http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607523f79c840---59632179592.pdfIn PDF document text
- http://bio86.fr/fichiers/bowajixoregitiwa.pdfIn PDF document text
- http://stlukesmn.org/clients/17773/File/92206924257.pdfIn PDF document text
- http://ytbozhuo.com/upload/file/240151012981.pdfIn PDF document text
- https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/730a1ad21d6d7d66a4d370aeb666cca0/20453624303.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1c6f2afc2a69c6721bb2b9a2895045b5/37555572622.pdfIn PDF document text
- http://bulk-supplies.com/userfiles/file/fokavuxevolar.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767c429cc4d---8927572135.pdfIn PDF document text
- http://itemclinicchina.com/ckupload/files/mutusa.pdfIn PDF document text
- https://mecaniquekd.ca/upload/file/20009070837.pdfIn PDF document text
- https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/ac8e2c31a206bde10fc3d2b4e76ff1e0/xunem.pdfIn PDF document text
- http://matchonusa.com/uploads/files/naganagukanoxefes.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c47d18439868051bc6a59f2d9772f716/fojoveritasal.pdfIn PDF document text
- http://mrcubezpieczenia.pl/app/webroot/media/files/21983367181.pdfIn PDF document text
- https://personnelcle.com/userfiles/file/52511857711.pdfIn PDF document text
- http://mega-stainlesssteel.com/uploads/image/files/sodojotutig.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a2b2cd21e---2302340597.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850e63120ee---bawowogakakirezaromapafi.pdfIn PDF document text
- https://betibg.eu/webroot/img/files/64546979078.pdfIn PDF document text
- http://chromowane.com/userfiles/file/gilemawudu.pdfIn PDF document text
- http://ebsenglish.net/_UploadFile/Images/file/84507264172.pdfIn PDF document text
- 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_off0000de67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE67	10768 bytes
SHA-256: `bd893cca409114795abe873e8305dffd89375c73d6647906892303e193a3db53`
`font_01_sfnt_off0000f71f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71F	19592 bytes
SHA-256: `e033999e8a2d703e1ca31e3fa8c5e8596ec4e4299dd10ab7d18f01a7936d48e3`
`font_02_sfnt_off00012833.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12833	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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