PDF malware analysis — malicious · ed0dd2d3a6300617

MALICIOUS

PDF

76.7 KB Created: 2021-09-16 06:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: fac9d686a4e885c5c4661a2c5538d858 SHA-1: 9bce0159be5669c3d5ea94e2b4bcc60bbb37810d SHA-256: ed0dd2d3a630061752d578462268cf88ef48cfe4fc86cd09d51c4fccf40c419e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of embedded JavaScript and numerous external URIs suggests the PDF is designed to redirect users to malicious sites or download further payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a common tactic for distributing malware or phishing content.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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=android+logo+font+download PDF link annotation
- http://www.pibmg.com.br/ckfinder/userfiles/files/files/wiwefasozofinepotorib.pdfIn PDF document text
- http://tufaghanafc.com/js/ckfinder/userfiles/files/91126994764.pdfIn PDF document text
- http://www.sospapa24.com/lib/ckfinder/imgupload/files/32976237969.pdfIn PDF document text
- http://amongelite.com/ci/userfiles/files/53522773949.pdfIn PDF document text
- http://liburnia.pl/userfiles/file/97599683440.pdfIn PDF document text
- http://maivietnamesecotati.com/uploads/files/63142338610.pdfIn PDF document text
- https://ever-progress.com/upload/files/70362435203.pdfIn PDF document text
- https://raljob.com/userfiles/file/4063502858.pdfIn PDF document text
- http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/b021bc25a47497bc68889ca1c33c52a5/wimemunowejanizifoxik.pdfIn PDF document text
- http://decamiones.com/userfiles/file/wilokejevupiludubofo.pdfIn PDF document text
- https://termokingbt.com/ckfinder/userfiles/files/xolexepizazufu.pdfIn PDF document text
- http://antasboru.com/guvennet/resimlerfiles/37478995793.pdfIn PDF document text
- http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/48050355421.pdfIn PDF document text
- https://ssekolkata.com/ckfinder/userfiles/files/17352355459.pdfIn PDF document text
- https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/44278990280.pdfIn PDF document text
- http://antasboru.com/guvennet/resimlerfiles/naperojoremekix.pdfIn PDF document text
- http://willbramephotography.com/98114902525.pdfIn PDF document text
- https://fereshtegan.net/basefile/fereshtegannet/files/37790547555.pdfIn PDF document text
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/volavefalabekopip.pdfIn PDF document text
- https://nacituran.com/userfiles/file/rebuvuvipuvujavizutikewum.pdfIn PDF document text
- http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13412822478.pdfIn PDF document text
- http://www.greenfield-sustainability.com/images/files/35026404224.pdfIn PDF document text
- https://qigoodteam.com/uploads/files/202109042248164620.pdfIn PDF document text
- https://tarzminder.com/resimler/files/faxowedakutegunawepa.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_off0000c8ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8AE	17372 bytes
SHA-256: `6b4f62d228be4ffd1909e016213de5298080b74dd85dac9f1eca224e819d0dba`
`font_01_sfnt_off0000f5a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5A4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010dbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DBB	10296 bytes
SHA-256: `9bc4e06cf3fc7a6fc58af9047ff2a5ec4a66f9205bef467cf4cdc44b88759569`

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