PDF malware analysis — malicious · 93bd24e681641c88

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 07:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: af51999f3558d99253b1e22304983999 SHA-1: ef5619ba331e29ac226d31a9be090f8c10305505 SHA-256: 93bd24e681641c88ecab5d33655c8219ef80872637b4f6503633952c38cca26a

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded JavaScript (T1059.007) suggests the PDF is designed to execute malicious code, likely to redirect the user to one of the listed URLs for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://allytemp.ru/uplcv?utm_term=how+to+check+previous+locations+on+android PDF link annotation
- https://gallerylingard.com/uploads/file/26367254816.pdfIn PDF document text
- https://mobilaide.com/upload/editor/file/47244338569.pdfIn PDF document text
- http://svatba-emi.com/uploads/pages/files/27290954160.pdfIn PDF document text
- http://motivationandmomentum.net/ci/userfiles/files/zarudatojoza.pdfIn PDF document text
- http://jfhcoaching.com/userfiles/files/wusuloxajoboguloma.pdfIn PDF document text
- http://huzatfokozo.hu/editor_up/65836862851.pdfIn PDF document text
- http://nemeckystrakac.sk/editor_uploads/files/3441890910.pdfIn PDF document text
- http://accessiblevehicleservices.com/userfiles/file/sesajitajibotojoma.pdfIn PDF document text
- http://www.coverseg.com/uploads/ckfinder/files/42083321868.pdfIn PDF document text
- http://finalstage.biz/js/upload/files/51384041889.pdfIn PDF document text
- http://hotelbelleepoque.bg/userfiles/file/fekoroja.pdfIn PDF document text
- https://812423.situshoki1.com/contents/files/82710139493.pdfIn PDF document text
- http://makinsushi.com/uploads/files/digarimomokagu.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/o248gkdbn638glpsaiku6isth3/49933441699.pdfIn PDF document text
- https://eslms.com/userfiles/file/savifaxagatipo.pdfIn PDF document text
- http://k-sta.kr/FileData/ckfinder/files/20210921_A78296A4DA585E44.pdfIn PDF document text
- http://jingkangchem.com/upload/files/vevafizixavopiwu.pdfIn PDF document text
- http://bacsiha.com/public/ckfinder/userfiles/files/xobozaputuwoselixevinogi.pdfIn PDF document text
- https://bahispesinde.com/gnc/veri/_files/65589636314.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae3d91ba70---damalebowetofimetumuka.pdfIn PDF document text
- http://pk-rowery.pl/user_pict/file/8427826876.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/xosopasofijusituker.pdfIn PDF document text
- https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/tegapopugub.pdfIn PDF document text
- http://unitez.net/images/newtech/files/70797071760.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_off0000d85c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD85C	10948 bytes
SHA-256: `93675c49081c918c712f38ae2cf55e0dba7c2345307b439b273a610963c191b3`
`font_01_sfnt_off0000f1b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1B2	18156 bytes
SHA-256: `016fab1efd979d6960971b8ed9a2ccc1c44140b0afcf887f3bfcea2607f86207`
`font_02_sfnt_off00012177.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12177	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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