PDF malware analysis — malicious · 1536fffc6922d6f0

MALICIOUS

PDF

90.1 KB Created: 2021-09-20 14:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: dd9953f93ac7d95318a2e1a77b131c00 SHA-1: ea79b64e2356b3959f28a5499912428a2a545ab4 SHA-256: 1536fffc6922d6f050ca51bfeca1b4c747db60eaea14e6fefa58a35d53fc2321

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also contains numerous external URIs, many of which point to potentially malicious or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9937

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://studiospazioambiente.it/userfiles/files/11231793967.pdf In PDF document text
- https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/kewofulagowomelemum.pdfIn PDF document text
- http://nationalcoopadvisors.com/userfiles/files/70815487838.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614163daaf5f9.pdfIn PDF document text
- http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/27224006236.pdfIn PDF document text
- http://csc0351.com/userfiles/file/20210907235738_gy6g1e.pdfIn PDF document text
- http://csc0535.com/userfiles/file/20210915202213_is810p.pdfIn PDF document text
- http://www.koeru.eu/failid/file/28300384706.pdfIn PDF document text
- https://anaksemut.com/contents/files/66519886887.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16147487199ab4---68243141434.pdfIn PDF document text
- http://dkmmotor.com/files/userfiles/file/woraragekowotiwurur.pdfIn PDF document text
- https://searchkar.com/ci/userfiles/files/60445459215.pdfIn PDF document text
- https://machinex-machines.com/UserFiles/File/23217141369.pdfIn PDF document text
- https://www.institutvzdelavani.cz/files/20619179090.pdfIn PDF document text
- http://ecosdaliberdade.com/ckfinder/userfiles/files/29363887243.pdfIn PDF document text
- http://altaprecision.com/userfiles/file/79361271469.pdfIn PDF document text
- http://fsf-vastroad.com/userfiles/file/86506111254.pdfIn PDF document text
- https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/83986301137.pdfIn PDF document text
- http://electric-kernbichler.at/koloforarof.pdfIn PDF document text
- http://thepokewave.com/uploads/files/nixefe.pdfIn PDF document text
- http://toyotaprius-custom.com/js/upload/files/21090176161.pdfIn PDF document text
- https://kaptenhoki.com/contents/files/lupajijuzawokuzakibinowu.pdfIn PDF document text
- http://yokosohk.com/files/fckfiles/file/xuxogizuparekasazuk.pdfIn PDF document text
- http://www.heksan.com.pl/file/mililesobeputavuwavez.pdfIn PDF document text
- http://top-caster.com/userfiles/file/83985473027.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+naruto+senki+release+worldPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fb50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB50	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011362.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11362	18684 bytes
SHA-256: `43d58ccc6e2df0ce1056e391af18d1722519169556a2e1d797e52fa7316239da`
`font_02_sfnt_off000142f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142F4	10520 bytes
SHA-256: `d5e5312804e0ff967d0897536c81ab7f69087cffa71c710b940e37127130360b`

Open this report in the interactive analyzer, or submit your own file for analysis.