PDF malware analysis — malicious · 60ea971b617a4284

MALICIOUS

PDF

84.6 KB Created: 2021-09-20 08:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: a3ce112288ea6acb6c187324bdf12682 SHA-1: 8917d3f2327e9978ff6e49594b71cec33fb5d173 SHA-256: 60ea971b617a42843893b1dcdb7b51872ac397dfdc0cc66c8be8cdd8aaa349c1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised or malicious websites. The presence of multiple distinct hosts and the use of UTM parameters in URLs further support the phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://wastran.ru/uplcv?utm_term=videoder+app+install+download+free+full+version PDF link annotation
- http://www.flamanville-76.fr/upload/file/relegawisevaga.pdfIn PDF document text
- http://zaintik.org/files/galeria/files/79672927150.pdfIn PDF document text
- http://levne-pohary.cz/UserFiles/File/61600914834.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16140e357301f0---34975108372.pdfIn PDF document text
- http://studiotecnicofrisoli.com/userfiles/files/28190523507.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130227932224---rogonilazejupiwek.pdfIn PDF document text
- https://thietbivesinhanhhuy.com/asset/files/mawisetuva.pdfIn PDF document text
- http://podhoru.cz/userfiles/file/gifekeguvukumeru.pdfIn PDF document text
- http://iact2001.com/userData/board/file/50972304585.pdfIn PDF document text
- http://ajk-opakowania.eu/upload/fck/file/59040291031.pdfIn PDF document text
- http://fosterfreezesantarosa.com/uploads/files/bifopukuxezixetupimig.pdfIn PDF document text
- https://prospr.fr/ckfinder/userfiles/files/xasavije.pdfIn PDF document text
- http://rockhousemethod.com/ckfinder/userfiles/files/sagerewujereteboganetaxos.pdfIn PDF document text
- http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144f368807a4---38490776114.pdfIn PDF document text
- https://gyn-koe70.de/obrazky/file/balilukaxolerubawomana.pdfIn PDF document text
- https://optical-axis.com/uploads/files/202109121650129847.pdfIn PDF document text
- http://stapper.de/sites/default/files/userfilesfile/nevagakufu.pdfIn PDF document text
- http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/54912342247.pdfIn PDF document text
- http://softwaretesting.kr/club/data/userfiles/file/20210908225456.pdfIn PDF document text
- http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5f5299624ff80b1145c4e11493adfd75/lulola.pdfIn PDF document text
- http://96rangjai.com/userfiles/file/39572039543.pdfIn PDF document text
- https://holyfamilyhospitals.com/ckfinder/userfiles/files/vajubukulidixetozez.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_off0000d081.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD081	17048 bytes
SHA-256: `d8b37dcec84ede88b1fcf62ef8dc6a9e92e4fba8fb1e748a401a28211c82f9ad`
`font_01_sfnt_off0000fc42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC42	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011453.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11453	16424 bytes
SHA-256: `ef8701eb79685041ba51b48b3ed5be6a2743d899f5b89193a8f0275675b44e26`
`font_03_sfnt_off00012b12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B12	10712 bytes
SHA-256: `1335e6c74952152e2656aa20d1fa3cc9123ea963d7db37d7196921225818986c`

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