PDF malware analysis — malicious · e165f3aeb1c7d3d9

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 14:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 8aab2fa1802cba60a5e1838f31cefb74 SHA-1: 9f3fbcb06582207efe8cf0d80e4bcc09ce6aa85e SHA-256: e165f3aeb1c7d3d9fb6ea15e58bf9c4977efd99d6a2f0ca04e4bdcd5a0c331aa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8ce72439f651a2ec5bb8b5a857fc1a8f/dafifumonos.pdf In PDF document text
- http://caopump.com/admin/userfiles/file/45301231906.pdfIn PDF document text
- http://egonseetour.com/FileData/ckfinder/files/20210623_20C7B14BA424ECE5.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609df21cd0c17---90487752213.pdfIn PDF document text
- https://louvre.lv/res/wysiwyg/file/xujezokuxakulek.pdfIn PDF document text
- https://dienlanhbachkhoa.info/upload/files/kabozabupapugeru.pdfIn PDF document text
- https://aduanaldelvalle.com/userfiles/file/59594524756.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609afb40a72d2---turipububusedazidefibem.pdfIn PDF document text
- http://bagumul.com/file_upload/spaw_upload/file/20210609000311.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609849ab05cb8---wezejalozatevigeboven.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/6bd443fef0f93f42ce1e99e8e243b40a/rizizezufetopido.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/43875464804.pdfIn PDF document text
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986e08c12c0---pilujazeka.pdfIn PDF document text
- https://diaochue.vn/userfiles/file/83345037286.pdfIn PDF document text
- https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/vl73ml0o8mkmj579pf1ndhse9t/14636243397.pdfIn PDF document text
- http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9714577933---togot.pdfIn PDF document text
- https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c6023a98387b07f96619fd216987483e/93716491824.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/98748688158.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/01f11a1bbccf19b7a2875a4b7952f67a/xiwufurovigiwegawomixolut.pdfIn PDF document text
- https://zionapostolicministries.org/uploads/file/45476871739.pdfIn PDF document text
- https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/3c32fc867530539b8fe08ee24d5ba1fb/8421502086.pdfIn PDF document text
- https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/mm789hus3klgdr21nnbhkkv6cf/wevugosewibedurexube.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0aad73479c1f0eef1c50a5ed7f532b56/bejazo.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mi1e9h7ffsuoupl93kouj5d3p7/talotiguwiwowut.pdfIn PDF document text
- http://ebsenglish.net/_UploadFile/Images/file/zewazaxuwedelijewi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=digestion+of+carbohydrates+class+11PDF 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_off0000e9a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9A7	16236 bytes
SHA-256: `3c9e3728d25cfcd4121c0e7cff5ae5e30663710b19d53170047c8d7dcf42a495`
`font_01_sfnt_off000113da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113DA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012bf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BF1	11064 bytes
SHA-256: `ee70357b8ac208c13fb1d0cbe8d55279609bd9b1c17c2b581b66a0b111ca9fde`

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