PDF malware analysis — malicious · 867f831d0f8bdf8d

MALICIOUS

PDF

82.8 KB Created: 2021-09-14 11:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 3f791e663486861ab1dc7a9a39d3f2a6 SHA-1: caa5c78f6bd7994c161e9eb4de0621490af215eb SHA-256: 867f831d0f8bdf8d1afe0af74540e60c71f7ea956fc7eee847db05d41b5a361b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised websites and disposable hosting, indicating a likely attempt to distribute malicious content or phish for information. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and embedded URLs suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9766

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://inwebjor.ru/uplcv?utm_term=whatsapp+geheugen+vol+android PDF link annotation
- http://appartenvue.net/appart/upload/images/45349925976.pdfIn PDF document text
- https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f6278f331896e544f4ae5625829a7638/wowamofir.pdfIn PDF document text
- http://ky-auto.com/uploadfile/files/53522382297.pdfIn PDF document text
- http://adhunikjewellers.com/ckfinder/userfiles/files/98364918243.pdfIn PDF document text
- http://njchemland.com/upload/files/zadulasafawu.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/6a2fa2a31109794daae181a473c9f6d4/ginevagarobeto.pdfIn PDF document text
- http://musicandyouapp.com/webupload/editorimg/files/72850554175.pdfIn PDF document text
- https://vresponse.net/userfiles/file/zajunudulugusedabevimawi.pdfIn PDF document text
- http://law885995.com/upload/fckimages/file/11524577268.pdfIn PDF document text
- https://novahealthclinic.ca/userfiles/file/jerupigobodaxerodi.pdfIn PDF document text
- http://flyingkirin.com/uploadfiles/file/061229445454.pdfIn PDF document text
- http://bearings-home.com/userfiles/file/21052227816.pdfIn PDF document text
- http://seowonbattery.com/files/fckeditor/file/1027820051613886d89a348.pdfIn PDF document text
- https://ripedzn.com/app/webroot/files/fckeditor/file/suzeg.pdfIn PDF document text
- https://nsck-cykelmotion.dk/userfiles/file/vobijusawaneguva.pdfIn PDF document text
- https://jeneifogaszat.hu/cikkdata/files/lakirot.pdfIn PDF document text
- http://congluc.com/upload/files/41486126208.pdfIn PDF document text
- http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/57372406123.pdfIn PDF document text
- http://ineke-ott.nl/keramiek-beelden-imagesfile/vufegikusopusisoduni.pdfIn PDF document text
- http://hotelpenza58.ru/ckfinder/userfiles/files/novivodutatezeginog.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303a47e8d1e---95562901680.pdfIn PDF document text
- http://architettomontanino.eu/userfiles/files/39276230940.pdfIn PDF document text
- http://rayanchem.com/d/files/97257308301.pdfIn PDF document text
- http://celcg.pl/uploaded/file/82126732866.pdfIn PDF document text
- https://letajicikoberce.cz/userfiles/file/23297403366.pdfIn PDF document text
- http://alliance-ic.ru/uploads/file/kixitugezobelozusonade.pdfIn PDF document text
- http://e-baze.lv/images/site/file/59294359546.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_off0000c1d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1D9	10832 bytes
SHA-256: `0bc451aab5c825ce0e4648ee3643555b7645aadd928adcea7708d0268729a4dd`
`font_01_sfnt_off0000da98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA98	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f2aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2AA	20652 bytes
SHA-256: `7126bceef27be95e1857d4b949c292b311c11cad97a1450a6c42b42b67a7e988`
`font_03_sfnt_off0001273f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1273F	16416 bytes
SHA-256: `266052261179a6871df7747dc9472d93006e8de3ec62e648f1316416a0985918`

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