PDF malware analysis — malicious · 0d741141e529cbcc

MALICIOUS

PDF

112.0 KB Created: 2021-07-06 14:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 9e15af0229e694956e53ea756fc92372 SHA-1: 78b8ffbfbb2046a5cdafee2e82db9f251b324f61 SHA-256: 0d741141e529cbcc0022598b06050b4d3e6f929f7b7ab238431d28dc30f2dd51

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to external sites, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9279

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://drafthe.ru/uplcv?utm_term=map+of+ancient+nubia PDF link annotation
- http://taxicityplus.ru/userfiles/file/kerepogaw.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/f3b989e54f1284fc4c12a79f09d6a4bd/22905191261.pdfIn PDF document text
- http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/kl54tfs31nv22j8lt1qn9vdkof/78814208905.pdfIn PDF document text
- http://www.abcklima.hu//data/editorfile/83810828974.pdfIn PDF document text
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/371dee397cf6b5c54cd243e8f408ae5f/39680303474.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16095061c89432---netufefijesilo.pdfIn PDF document text
- https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/ev3egr9gsnauurj0o4goiqr41q/16014269468.pdfIn PDF document text
- https://radmangroup-ye.com/rgfiles/file/tezosipekorikex.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609be59018a4c---79652507456.pdfIn PDF document text
- http://anipetkingdom.com/webroot/img/files/69735318857.pdfIn PDF document text
- http://styropapex.pl/userfiles/file/89571326321.pdfIn PDF document text
- https://www.profiemg.cz/upload/ck/files/kapigafitek.pdfIn PDF document text
- http://maxtarget.by/ckfinder/userfiles/files/69168687986.pdfIn PDF document text
- http://pincailight.com/zk/UploadFile/file/2021062304492273499.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609caeab7fb18---53962415050.pdfIn PDF document text
- http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2204a55f9---susovediw.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/2hbbtlscf1pqcqm4j915rkoeab/32748375767.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ac0238429---29758179177.pdfIn PDF document text
- https://seerupit.dk/assens/file/niroj.pdfIn PDF document text
- https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/13683a0496b46328eefc23c4217fa137/mojebewodatovumirinin.pdfIn PDF document text
- https://chinese-wall.tw/upload/files/bivuvaxepagox.pdfIn PDF document text
- https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/27aab9eb9584c9502555902ada586181/1306454988.pdfIn PDF document text
- https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/29cb357a2776ccdee713fbb8d5c0dba5/jenidodegogoxe.pdfIn PDF document text
- http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c8110275f2b53197af3befe815e57038/1115852885.pdfIn PDF document text
- http://originalcheck.it/public/img_admin/file///lapajagatufozezu.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bd4a3e004---61432161195.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/a52282e9f627278872c3f037fa79ebdb/74442358907.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00010ffc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x10FFC	23984 bytes
SHA-256: `84ce0e7933fd85be9e672f3007396ec4ccea5a276b89ea8733a48e4f2de33656`
`font_00_sfnt_off0000f88e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF88E	10392 bytes
SHA-256: `676225bf5fe8044a3c5c1e18ade051cb6060d85ead7f3a29701f2bb631f70eba`
`font_02_sfnt_off00013ba0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BA0	29900 bytes
SHA-256: `25ac1c8a93e7546a3bd6efc01987026015792ef251c75945cc85beee18427b83`
`font_03_sfnt_off0001838b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1838B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_04_sfnt_off00019b98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19B98	6412 bytes
SHA-256: `d9ab18005285c47e5379af64d5139676b119a1ea2e8f254b5822f91ff7ceda9e`

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