PDF malware analysis — malicious · 002805f0d689dd62

MALICIOUS

PDF

89.5 KB Created: 2021-07-17 10:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: b382f66235283800a17b149b0ebd1f33 SHA-1: 20049df8c76f74db464c4203ecafc72d56dfb04b SHA-256: 002805f0d689dd629c4147dd3238d3208601a4e3c170c186c4719c2f0a7e1be2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple external URIs and a link farm structure suggests an attempt to lure users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://vicotelecom.vn/static/source/images/file/6599331185.pdf In PDF document text
- https://al-farh-iq.com/upload/userfiles/file/77384868145.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cc71acf60---92398764310.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fad14bdd67---sokisozaxomejitak.pdfIn PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094309412bb1---87389534723.pdfIn PDF document text
- https://aradmissions.com/ci/userfiles/files/musatatirunelokes.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/dc1cd386a2fafcf1e6c83a0ea8327d8b/9509797734.pdfIn PDF document text
- http://www.cenlajobinator.com/siteuploads/editorimg/file/90188848881.pdfIn PDF document text
- http://kahounova.cz/userfiles/file/jilabo.pdfIn PDF document text
- https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b057a561a5---80939652160.pdfIn PDF document text
- https://ibextrail.com/editor-images/63585580042.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/bdd4306d6544d79e880c4e6f398dc5cf/xuzadajegodadagevodotase.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609532007c49c---62761498498.pdfIn PDF document text
- http://france-ex.com/images/blog//file/mipexejiluwi.pdfIn PDF document text
- https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/dv154keu81sfi8scpocga17ev2/dekulumovozefefugaze.pdfIn PDF document text
- https://ottopianos.nl/files/koxokopaxupitazil.pdfIn PDF document text
- http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/156bb48ghtv76u377a85dmngk4/57737684905.pdfIn PDF document text
- http://turhantur.com/turhantur/files/32400560577.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/039v1oc69o9a67nelm6kefn135/59008688531.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094db7531677---mobivavinewazagigenofam.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/7050a27caac46107966bba15e2fddf07/sulaxitaru.pdfIn PDF document text
- https://bhsbeacon.com/FCKeditor/file/53478747942.pdfIn PDF document text
- http://lab4050.com/upload/editor/file/lodisubemujevosamokip.pdfIn PDF document text
- http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/laweretisuwizodawo.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3f0b139f5---1905182330.pdfIn PDF document text
- http://joy05.com/_UploadFile/Images/file/dufedopuwefareretur.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a71093d0e783d210eeda3361607d6ab9/kodagebevuwisezozuzi.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=app+which+can+read+pdfPDF 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_off0000fb5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB5C	10352 bytes
SHA-256: `7ce1f2388d6df5458b0c03d0f71f82005a447342aa90a2f01acc126605d40e93`
`font_01_sfnt_off000112c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112C0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012ad2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AD2	17060 bytes
SHA-256: `075d40e66453e3fa94d7d3f8ec7c4c1259c61dfd3bc48c731826cdada2ed6bc8`

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