PDF malware analysis — malicious · a37fcca01e69c3df

MALICIOUS

PDF

77.8 KB Created: 2021-09-19 05:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 566580a75dcc9424a344ea1342c6da2a SHA-1: 91e6f95d8968f4f1364e7556777616cd808580c2 SHA-256: a37fcca01e69c3dfa988f0f9837e7fc9c02dd7a72922673c41e455855c2b591c

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external URIs, including one pointing to a link farm, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the overall structure and URL findings point to a malicious PDF designed to trick users into downloading further malicious 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://ketchas.ru/uplcv?utm_term=simcity+iphone+cheats+2020 PDF link annotation
- https://dukeofmarshall.com/ckfinder/userfiles/files/89626257720.pdfIn PDF document text
- http://djk-winkel.de/images/uploads/file/49787440645.pdfIn PDF document text
- http://the100voicesofgospel.ch/fichiers/newsletter/file/lenipipogilorumarafelu.pdfIn PDF document text
- http://haraj-alqunfudhah.com/userfiles/file/punug.pdfIn PDF document text
- http://indecomavo.pl/userimg/inc/90562854904.pdfIn PDF document text
- http://polyacer-ecp.com/userfiles/files/20210913_223354.pdfIn PDF document text
- https://thebillionbottom.com/business_school/uploads/file/visuronirenaze.pdfIn PDF document text
- http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3f8ae22a8---93310043386.pdfIn PDF document text
- http://e-skala.pl/userfiles/file/42247325409.pdfIn PDF document text
- http://maiodi.com/userfiles/files/vaked.pdfIn PDF document text
- http://ymjgolf.com/file_media/file_image/file/jebozinosevisulasali.pdfIn PDF document text
- http://borneneskontor-landsforening.dk/userfiles/file/nepiwujitozutuk.pdfIn PDF document text
- https://lp-tracking.com/userfiles/file/10439627139.pdfIn PDF document text
- http://kargo-box.com/uploads/files/mipajajen.pdfIn PDF document text
- http://gpmpoolandspa.com/ckfinder/userfiles/files/peromozazojur.pdfIn PDF document text
- http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/wevabebonofesoruwuroninu.pdfIn PDF document text
- http://portamarioarchitetto.eu/userfiles/files/1306582582.pdfIn PDF document text
- https://transmilenio.net/datamont/userfiles/file/25042603637.pdfIn PDF document text
- http://ieltsadd.ir/cache/fck_files/file/repup.pdfIn PDF document text
- http://dorrstrechy.cz/UserFiles/File/minimalarevulal.pdfIn PDF document text
- http://stellarp.com/userfiles/file/jugubumisasatavir.pdfIn PDF document text
- https://goodluckfishing.com/ckfinder/userfiles/files/pilifikapojufakitokos.pdfIn PDF document text
- http://sun-green.eu/ckfinder/userfiles/files/jemajofuzux.pdfIn PDF document text
- http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/lataxuwerowozavid.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_off0000cb21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB21	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e338.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE338	10924 bytes
SHA-256: `eacb6e9637ed64fe45afc50081971708615b9ef4919c415be49e368ca1cf191b`
`font_02_sfnt_off0000fc64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC64	17420 bytes
SHA-256: `c61939f28f3b36c790e9f12099c879d17bc0a6d83c7c4a71ec50332717a28293`

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