PDF malware analysis — malicious · 4efadb1d25e9251d

MALICIOUS

PDF

94.4 KB Created: 2021-08-02 17:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0b33353f2a247594130079a51f7de782 SHA-1: e6f2719bbcd878d8889bf4ad6c6fafefa998d1d4 SHA-256: 4efadb1d25e9251d55df4a27480b16e24890baae2e5ab331191cef8eea766bf8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of external URIs and link farms on disposable hosting further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9907

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://nomylo.ru/uplcv?utm_term=la+liste+de+mes+envies+samenvatting+scholieren PDF link annotation
- https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/3b6353998eaea8ad115f0631c4a26a57/vamuxujixufizezexegoxafun.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d915f97a337---velakixazagakuzukit.pdfIn PDF document text
- https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/rlkkc0kogr7brje84t19vo6q80/31589921821.pdfIn PDF document text
- http://luvnchrlysenglishtoys.com/clients/861429/File/68500467029.pdfIn PDF document text
- http://gorisum.net/fckeditor/upload_file/file/saratebebesegusanixiw.pdfIn PDF document text
- http://nsfeed.com/_UploadFile/Images/file/lazibaxokidipefikogarexi.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dda9c1c6c---wiwozosulowivefu.pdfIn PDF document text
- http://zxpgw.com/userfiles/file/bumivoramitowo.pdfIn PDF document text
- http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/fdf7513ba8deb549f141e960ed145542/sijokivawuremexumujalu.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb0e6b45b---55009690402.pdfIn PDF document text
- http://speakingaboutnetworking.com/ckfinder/userfiles/files/mufisuzawe.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071acd806d68---57438111027.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160825a5398392---40918999436.pdfIn PDF document text
- http://amandamaitland.com/images/file/73250321727.pdfIn PDF document text
- https://sunnyvale.com/wysiwygfiles/file/36309508576.pdfIn PDF document text
- http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ced734559083d18a662f489462f069dc/voxexiturojasaliworenuta.pdfIn PDF document text
- http://hitecds.com/userfiles/file/58048382503.pdfIn PDF document text
- http://jmdfhjl.com/fckeditor/userimages/file/31461371216.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c525cf535---72218889206.pdfIn PDF document text
- http://senseoftourism.dk/userfiles/file/bulap.pdfIn PDF document text
- https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/fa12a4d93ad2f94ec2f10d73b25009b4/17315581581.pdfIn PDF document text
- http://dietaltop.com/userfiles/files/jopiwiraziwufujarul.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b4339278c5a55a2da97c44be8affb54d/73604749352.pdfIn PDF document text
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160758f526a400---30268555552.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609879501c231---pulabawimekomixazabe.pdfIn PDF document text
- https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb0132419e6f5e227c448fae6d9249de/jepun.pdfIn PDF document text
- http://originalbau.hu/imagesfiles/gajupafoxiruti.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f71e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF71E	10840 bytes
SHA-256: `8bfd0eb4a573d00a47423a5d1fe1a453608d33b87f87e8cb87d3d1e41db88095`
`font_01_sfnt_off00010fb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FB8	16092 bytes
SHA-256: `9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd`
`font_02_sfnt_off000124f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124F9	18268 bytes
SHA-256: `1fa8c1343c00aabc76d81b85cab6f31687191c666965455ddc93931ce28e911f`
`font_03_sfnt_off0001524d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1524D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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