PDF malware analysis — malicious · c58cd88175506bac

MALICIOUS

PDF

78.6 KB Created: 2021-09-11 12:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 24b874db126aa8d6157ef93191387f55 SHA-1: 6972855253b4682532fc9b0fd45f9518dcdfdc8f SHA-256: c58cd88175506bac4d18c6e792670664bc0600cb79e7c5f6278d4463f72f47ce

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to host or redirect to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://pistant.ru/uplcv?utm_term=idaten+jump+game+download+apk PDF link annotation
- http://preiss.at/upload_files/files/xavizonolononutinir.pdfIn PDF document text
- https://needlugs.com/userfiles/files/wezigarimutesata.pdfIn PDF document text
- http://eyupsifalibitkiler.com/resimler/files/punamigovuxabutebizisevi.pdfIn PDF document text
- https://bodegoncriollo.com/userfiles/file/rudutuwirawom.pdfIn PDF document text
- http://yeditepegumruk.com/userfiles/15648036888.pdfIn PDF document text
- http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/fedewafilaxenunelixo.pdfIn PDF document text
- http://astprom.ru/sites/default/files/file/95064778061.pdfIn PDF document text
- http://indagosrl.it/userfiles/files/6564555319.pdfIn PDF document text
- http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/52806159640.pdfIn PDF document text
- https://bandotrading.com/uploads/file/kivodimigeledilowiw.pdfIn PDF document text
- http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/71754561155.pdfIn PDF document text
- http://abw10thstreetne.com/uploads/files/daxogafupe.pdfIn PDF document text
- http://www.deopendeur.org/imgUser/file/zagozitibaxivamun.pdfIn PDF document text
- http://contrast.no/ckfinder/userfiles/files/gimidudanunijukefirod.pdfIn PDF document text
- http://churchtextile.com/userfiles/file/xoliriwuv.pdfIn PDF document text
- http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/41720181301.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/39951711731.pdfIn PDF document text
- http://bkmarine.net/ckfinder/userfiles/files/1630990608.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136658003e42---36238260509.pdfIn PDF document text
- http://gpmpoolandspa.com/ckfinder/userfiles/files/xodaparufoweteso.pdfIn PDF document text
- http://bud-med.eu/userfiles/file/95520584048.pdfIn PDF document text
- http://ikkosushi.com/uploads/files/82214766748.pdfIn PDF document text
- https://kiptep.ru/file/83064632780.pdfIn PDF document text
- http://monarchiaerembolt.hu/tmp/gojozebusasa.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_off0000c853.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC853	19788 bytes
SHA-256: `eb48a95142f5cf88b0050d73261bd3941d594100e652d342f66b351004a93257`
`font_01_sfnt_off0000fc2a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC2A	10732 bytes
SHA-256: `4bcb184c2e69c8b697ccf91e21be333125ba9612b212fcb39640574d54a05648`
`font_02_sfnt_off000114a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114A2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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