PDF malware analysis — malicious · e7c62ec702750a22

MALICIOUS

PDF

70.9 KB Created: 2021-09-17 16:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 125ef6a1f01cc50dab6623724a555e46 SHA-1: 78d4205c981931103a56fbcc14cbb4f0353c8ca2 SHA-256: e7c62ec702750a22c1c5c0d28711c6195e4cf54d2db7631f81c55d72b66fd8e1

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or scam lure. The presence of a 'download button' heuristic further supports the idea that the document attempts to trick the user into downloading a payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=bigg+boss+telugu+4+movierulz PDF link annotation
- http://expnavi.com/sites/all/sites/default/files/file/venirapexisugewapeg.pdfIn PDF document text
- http://murito.fr/ckfinder/userfiles/files/ligurudefejijedobuw.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132b52c21274---47568964821.pdfIn PDF document text
- https://kaptenhoki.net/contents/files/94230751021.pdfIn PDF document text
- http://ordineveterinarireggioemilia.it/userfiles/files/96803724872.pdfIn PDF document text
- https://zlato-stribro-investice.com/upload/files/diduwef.pdfIn PDF document text
- https://byocamacho.com/ckfinder/userfiles/files/ganedojov.pdfIn PDF document text
- http://rtm-plus.ru/ckfinder/userfiles/files/48590160659.pdfIn PDF document text
- http://przedszkolenisko.pl/userfiles/file/bivawubifidiwaz.pdfIn PDF document text
- https://maviet.vn/upload/files/60071577594.pdfIn PDF document text
- http://medicaldistri.com/ckfinder_files/files/99601273359.pdfIn PDF document text
- http://saaretravel.ee/images/file/78836882789.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/61955802833.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/d55eglkim5d9hlj3sk92oc8rp1/88698393447.pdfIn PDF document text
- http://probeg2000.ru/files/userfiles/files/14834733150.pdfIn PDF document text
- https://at1-turbo-j3t.com/contents/files/pefetamurugudij.pdfIn PDF document text
- http://bpsstudio.hu/uploads/75190648740.pdfIn PDF document text
- https://b7b.reviewz.eu/app/webroot/files/userfiles/files/30023563490.pdfIn PDF document text
- http://b40555.handyfriendship.com/upload/files/90820934299.pdfIn PDF document text
- http://aybar-gallery.com/userfiles/files/7991976168.pdfIn PDF document text
- http://galluccifaibano.it/userfiles/file/87594986345.pdfIn PDF document text
- http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/rabovoso.pdfIn PDF document text
- http://sayarbobinaj.com/file/82577991819.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/mofonovijepatugomotig.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_off0000b1dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1DC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000c9ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9EE	16260 bytes
SHA-256: `97f850cb214d386ab66ac1f4a616cc49bbf405be009882eeddf7702339e2fa18`
`font_02_sfnt_off0000f3b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3B4	10680 bytes
SHA-256: `a4ccd76607e61b95fb57f3475589185697c65a7db28ca903b03ebd08bc640137`

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