PDF malware analysis — malicious · a8fca7304997154f

MALICIOUS

PDF

79.9 KB Created: 2021-09-21 11:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: c055e209340388bdf2d574c7c456aa9c SHA-1: 20bf41b4a2046f3179c473188d57e9f60d6f3182 SHA-256: a8fca7304997154f57bd0be3e79509b15eac64b451f27f4f12b1c452d902e42d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a password-protected archive lure. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a phishing or malware distribution campaign. The document's structure and embedded links align with techniques used to trick users into downloading malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://allytemp.ru/uplcv?utm_term=recuperar+archivos+borrados+tablet+android+gratis PDF link annotation
- http://consol.hu/images/uploadedimages/file/462570809.pdfIn PDF document text
- https://sergiomauri.com/images/file/tijoxiratogetomerefoju.pdfIn PDF document text
- http://www.centralperdana.com/file/lijilapilewowavataxur.pdfIn PDF document text
- http://tchid.net/userfiles/file/55268008717.pdfIn PDF document text
- https://edouardweil.com/userfiles/file/83492105885.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb3c4f06d4---govipez.pdfIn PDF document text
- http://www.dkmodels.net/ckfinder/userfiles/files/zaxubopomalilulan.pdfIn PDF document text
- http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/nidezutibuzo.pdfIn PDF document text
- http://www.hermosabeachbungalows.com/userfiles/files/lulufuzi.pdfIn PDF document text
- http://zdrowejaja.com/Upload/file/wafuxofoneganot.pdfIn PDF document text
- http://odumakus.com/uploads/files/zusiwovebumof.pdfIn PDF document text
- http://pekingtogo.com/uploads/files/fifafaxoxexegupider.pdfIn PDF document text
- http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/52497718263.pdfIn PDF document text
- http://rspon.pl/images/wyswig_images/file/34028492796.pdfIn PDF document text
- http://bowie.abwingsmd.com/uploads/files/namagepe.pdfIn PDF document text
- http://lutechmed.com/Images_upload/files/kimavubiba.pdfIn PDF document text
- https://cafemocion.com/userfiles/file/niropimajamoxe.pdfIn PDF document text
- https://gulfsupremesa.com/ckfinder/userfiles/files/15397130300.pdfIn PDF document text
- http://jn-zhsc.com/upload/fenizopusukewave.pdfIn PDF document text
- http://diennuocdanang.com/uploads/image/files/rewibekukidot.pdfIn PDF document text
- http://bluelakehomestay.com/uploads/image/files/ripipufuwutaguderani.pdfIn PDF document text
- http://www.frank-diagn.hu/userfiles/files/meguj.pdfIn PDF document text
- http://divorce-difficile.fr/userfiles/file/14340434510.pdfIn PDF document text
- https://citrasas.com/userfiles/file/11744091933.pdfIn PDF document text
- http://xn--e42bt3l.net/upfile/files/82301561668.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_off0000d3c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3C1	11144 bytes
SHA-256: `3a83a944da4e5599e65d7d499fea1d09bc5a8f7f848f80c76edac28d352b63ef`
`font_01_sfnt_off0000ed50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED50	16860 bytes
SHA-256: `33c1c65e93ec4151daea07197d35d1b1447004595c1ffbb875df33ce6ac37d16`
`font_02_sfnt_off000117b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117B4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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