PDF malware analysis — malicious · 70f7257589118e20

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 12:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1578738dd475fff5bd7b7e926feacc4d SHA-1: 9d0ed650faa2bcc51ebff4dc74ea6b3b509bcdf7 SHA-256: 70f7257589118e208a12c38dccf186be32a0ecd2b7563272a91d741317c04865

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable domains, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body was unreadable, limiting the ability to determine a more specific attack pattern or family.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 5

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://ekransamara.ru/files/33290959864.pdf In PDF document text
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/v0il9td05a5ueva8bmjlspi7o3/junumepususase.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da610b496---fuzunapitewize.pdfIn PDF document text
- https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/fd2200c99768de7ca3a27771b262512d/63767049487.pdfIn PDF document text
- http://mashhadgardi724.ir/basefile/mashhadgardi724/files/pawatepikezijaguze.pdfIn PDF document text
- http://przedszkolenisko.pl/userfiles/file/35154628772.pdfIn PDF document text
- https://atlastoursntravels.com/userfiles/file/12853872808.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/1hqdbqr2rt5ta2up6ske5djk6u/seveboseratufaza.pdfIn PDF document text
- https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/tfni2sknae184gh7evk06oec8b/8051040604.pdfIn PDF document text
- http://gphs84.com/clients/866382/File/74503734053.pdfIn PDF document text
- https://transilvaniafishing.ro/app/webroot/files/userfiles/files/36978656081.pdfIn PDF document text
- http://stillwaterponies83.com/clients/74660/File/wurur.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160852318badd8---bozepukofijo.pdfIn PDF document text
- http://sklepjola.pl/userfiles/file/dizaboramorimosupobonuw.pdfIn PDF document text
- http://isagenixmakessense.com/ckfinder/userfiles/files/7127465388.pdfIn PDF document text
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160782b9a5ac24---dejuvidupakedetebowusena.pdfIn PDF document text
- http://odessawa.com/userfiles/file/vepoduwarofetunebopu.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/39f71b2bc1e36adf4d15b3472865cb67/dekaxunodagu.pdfIn PDF document text
- https://sealskinz.ru/files/file/luwom.pdfIn PDF document text
- http://hongshengfish.com/uploadfiles/20210705/210705200448014514o29ii9m121cl.pdfIn PDF document text
- https://whitesal.com/data/images/file/2403_20210708165621.pdfIn PDF document text
- https://iltuosarto.com/file/ruxasafejugeduzexela.pdfIn PDF document text
- http://goldenpoolandsauna.com/user_img/files/bumided.pdfIn PDF document text
- http://stalmost.pl/userfiles/file/97941091245.pdfIn PDF document text
- http://theurbanbazzaar.com/userfiles/file/58970699312.pdfIn PDF document text
- https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/65499570647.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=operations+management+questions+and+answersPDF 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_off0000e244.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE244	11048 bytes
SHA-256: `471e4cb851a97613b7d37177031dabe1389cbc5a89a52d01cea6b4297f43c4d2`
`font_01_sfnt_off0000fb89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB89	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001139b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1139B	17280 bytes
SHA-256: `2010d20e5d29c7f893bfecfb15390c4a1da3748dc7d64edf932b92d07cbb635c`

Open this report in the interactive analyzer, or submit your own file for analysis.