PDF malware analysis — malicious · 2f88aeda00b038e6

MALICIOUS

PDF

67.7 KB Created: 2021-09-29 13:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 3718b5a49ecbe2c28ad085488137ee5d SHA-1: 3a12a698e76755daaeac13d9687c271eab7dad12 SHA-256: 2f88aeda00b038e67262746ac0817cd34914d02629e4eb13ab788cdd7cef736f

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for malicious PDFs. The PDF also contains numerous external URIs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9965

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 http://jafra-com.at/userfiles/file/pomededipewikixogej.pdf In PDF document text
- http://fermobkorea.com/userfiles/file/20210906215216.pdfIn PDF document text
- http://pasquarelloplumbing.com/UserFiles/file/7628813033.pdfIn PDF document text
- https://itexpertdog.com/upload/files/rinagodosovapuvi.pdfIn PDF document text
- https://maxlinder.com/admin/assets/ckfinder/userfiles/files/xawud.pdfIn PDF document text
- https://www.mmgrowersg.com/ckfinder/userfiles/files/zapewelab.pdfIn PDF document text
- http://lapawan15.com/shop/fck_file/file/74527600519.pdfIn PDF document text
- https://bangprice.com/bangprice.com/beta/cms_image/file/maxokemaripuda.pdfIn PDF document text
- https://somogyplusz.hu/files/surabilepevu.pdfIn PDF document text
- https://mariapolis.net/ckfinder/userfiles/files/62596028051.pdfIn PDF document text
- http://ildungrice.com/fileupload/fckeditor/file/magoxewagawexumenegu.pdfIn PDF document text
- https://diarch.in/WYSIWYGImage/file/8934467121.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9c324dab3254f3cfd7ebce494eb99545/57533489404.pdfIn PDF document text
- http://jsushibrea.com/uploads/files/roboserase.pdfIn PDF document text
- http://sutipatika.hu/userfiles/files/13654867617.pdfIn PDF document text
- http://salespate.com/userfiles/file/bimapituruxevuju.pdfIn PDF document text
- http://aguito.madteam.net/ckfinder/userfiles/files/pogom.pdfIn PDF document text
- http://www.sctiec.com/up_files/FCK/file/roletuvuvisuredexipaxu.pdfIn PDF document text
- http://baby-daycare.com/uploads/files/202109071818079491.pdfIn PDF document text
- https://pointvirgule.ca/upload/editor/file/98994245330.pdfIn PDF document text
- https://manpowernepal.net/ckfinder/userfiles/files/42374460497.pdfIn PDF document text
- https://ulsantour.com/FileData/ckfinder/files/20210929_1F4705D8E41FF914.pdfIn PDF document text
- https://lnpro.in/ckfinder/userfiles/files/gedevomoxufug.pdfIn PDF document text
- http://btsoft.vn/uploads/files/29001125136.pdfIn PDF document text
- http://coniperfumes.cl/js/ckfinder/userfiles/files/vawujeri.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=inshot+pro+costPDF 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_off0000ae38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAE38	14760 bytes
SHA-256: `c70aa75b0bc94ef555a14ceffb569f2368b593ebe3c419fee1de68b0a684ea4e`
`font_01_sfnt_off0000d375.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD375	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000eb8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB8B	9988 bytes
SHA-256: `85238c842feb88a9e66c3f0d7ab44d6a9f2c66842760abaf367b1913373cee41`

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