PDF malware analysis — malicious · 92b583be44bb4dc6

MALICIOUS

PDF

89.2 KB Created: 2021-07-25 15:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 2a201ca8327b8c483219fce1697372b8 SHA-1: 30733b266cc285fe464c26e11c48fc36f7261514 SHA-256: 92b583be44bb4dc645a2a670c37cbae007400eddd12a09f582b1973ad31d92e0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier strongly indicated maliciousness, supported by heuristics identifying the PDF as a link farm hosted on compromised CMS uploads and disposable domains. The embedded URLs likely serve as lures to redirect users to malicious sites. No scripts were extracted, but the structure suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160a0072762f0e---jedafuwezajurufejo.pdf In PDF document text
- http://princeworldwide.com/multimedia/userfiles/file/felusakodogelojanofilibem.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07f6a03e7---waduzarigagidizoroteto.pdfIn PDF document text
- http://longchimvac.net/app/webroot/uploads/files/92540687939.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58fd12a2c7---38952676980.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c88a6ed54---wefulavumilokinu.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd7a75f5c8---97898463503.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1ded18970---zotojeporejiwew.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4cce646dbb0115e75e7f7fb5516b6001/96377383826.pdfIn PDF document text
- https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/024a0bbb6f7675b3a83243760ef46771/tozotufepajej.pdfIn PDF document text
- https://cengilli.com/icerik_images/file/nimap.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b65a4854---baxovuxori.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/04ortj2u15patvfqkqjlai5f8t/19653304633.pdfIn PDF document text
- http://abwva.com/uploads/files/winafinurarib.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/34367130d3f4ee2c07926aa65dd6f025/mugogumekujisajakekotas.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/p28s82ue64iuj9dgku75vshk89/36483669670.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b289415286b---98780561390.pdfIn PDF document text
- https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/1fb4da6d3bd412b7064a1bdc2b96d533/42407387600.pdfIn PDF document text
- https://motacademy.it/file/pikaweked.pdfIn PDF document text
- https://palcev.ru/userfiles/file/76012545625.pdfIn PDF document text
- https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/e34d4efdfe4ace8ee1a320a58f1b0a36/resav.pdfIn PDF document text
- http://arredamentoambienti.it/img/file/19516816976.pdfIn PDF document text
- http://brilliantsolarpaneling.com/userfiles/file/74786231601.pdfIn PDF document text
- http://cs-web-design.de/ablage/userfiles/files/vipetez.pdfIn PDF document text
- https://ochronaskory.pl/pliki_user/File/bapuwe.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+hollywood+standard+2nd+edition+pdfPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00011ff2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11FF2	18592 bytes
SHA-256: `8cd231ffcbebbec642514ccf78428d464e138e662b3e1f56dbec316eb9ab3635`
`font_00_sfnt_off0000d8dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8DC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f0ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0EE	18796 bytes
SHA-256: `f8fb69836787b25150f76573ee2c209eb4249c6d4530e3b713cdf7b31222f1e1`
`font_03_sfnt_off00013da1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DA1	10876 bytes
SHA-256: `d134c207d07a92c79a80338890500d6ed7fe57eda885e56f69bcd83aae0ba64a`

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