PDF malware analysis — malicious · a3dfbbcaceb14616

MALICIOUS

PDF

89.2 KB Created: 2021-07-14 06:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 00e2b76586062cbb823bd4047e7c7b8c SHA-1: 331d558163ad40cca64a009480ee77a436b4ffbd SHA-256: a3dfbbcaceb146165f439993c1d20e36058069157db346ed28513907b62a925e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://laborke.ru/uplcv?utm_term=stay+with+me+rock+song PDF link annotation
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/e4m1se9mh0fm7fmhaagd0nmsam/36249519152.pdfIn PDF document text
- https://ddshower.com/ckfinder/userfiles/files/dalelisowivumunuxekuzez.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/bca402221439b9a1909c7e7b18197b42/gudum.pdfIn PDF document text
- http://raffaelecavazzoni.com/userfiles/files/69851475847.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3227ae709---laxeruwafixabusarizuwak.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb5953bcd7---66928782298.pdfIn PDF document text
- http://juentai.com/userfiles/files/wunaluxazevurovobabup.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160979a44898ae---bonirose.pdfIn PDF document text
- http://99hospitalitygroup.com/ckfinder/userfiles/files/47794726321.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/jnm97qdeqomdk7arn64u2euh3n/58133291821.pdfIn PDF document text
- https://anfauglir.com/images/file/sodilixofilesawudoketim.pdfIn PDF document text
- http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f00bbbb4b8---41136158424.pdfIn PDF document text
- http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607716fd827b2---72659126968.pdfIn PDF document text
- http://woods-china.cn/ci2/userfiles/files/20210704072057.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eea56e9789---94320337131.pdfIn PDF document text
- http://niszczeniewaw.pl/userfiles/file/podigomenatoresexiputinef.pdfIn PDF document text
- http://championshipsportsrings.com/clients/23492/File/73522397090.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a46a71ab1d8---muxezubi.pdfIn PDF document text
- http://schnauzermountainminiatures.com/clients/17729/File/forovagosopuxekadanaza.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd997b2d0e---23970561104.pdfIn PDF document text
- https://tasleemdubai.com/userfiles/files/14579765719.pdfIn PDF document text
- http://wami.cc/data/files/murapikesusek.pdfIn PDF document text
- http://xedaptap.net/userfiles/file/98141213376.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1a398eeb2---bixofojijasutefigewopupil.pdfIn PDF document text
- http://gshosnab.ru/userfiles/file/827873990.pdfIn PDF document text
- https://amursvoidom.ru/media/files/84028212600.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f83c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF83C	17348 bytes
SHA-256: `98415cafd52ebac56a57d6f6ba27430af0d1aeae651235aee4afc440a1ba7058`
`font_01_sfnt_off000125a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125A8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013dbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DBF	11000 bytes
SHA-256: `8f0772c1279d51f5fb4892a0eb60c7d5606b9e513b55db65b7fb0515d530116e`

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