PDF malware analysis — malicious · e7fbd905fb60a044

MALICIOUS

PDF

70.3 KB Created: 2021-09-29 14:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: c9d4fdd9bd4a1faaac967dfc74384f52 SHA-1: 6728b49c0c42a1961c855c458907debe08a107ef SHA-256: e7fbd905fb60a044bc9396501739b0d422220494020c5e3783f56400bbe904f7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the nature of the embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 5

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.
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://chcial.ru/uplcv?utm_term=naruto+shippuden+senki+the+last+mod+apk PDF link annotation
- http://ilonew.tasksplan.com/ckfinder/userfiles/files/zogivurikedosawaxol.pdfIn PDF document text
- http://aedelsur.com/contenido/files/42083049159.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/sulimedurazitov.pdfIn PDF document text
- http://sumosushingrill.com/uploads/files/gajujewutisipunubozumu.pdfIn PDF document text
- https://eseninternational.com/uploads/files/rogujumaxagu.pdfIn PDF document text
- http://proreferee.ru/uploads/ckfinder/files/5993015099.pdfIn PDF document text
- https://atlantidegattico.it/file/naweguzepikobirupunepuxom.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/58f6d1da467b9a988ba29a205672dd5a/47007790794.pdfIn PDF document text
- https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/96608737974.pdfIn PDF document text
- http://limobebe.com/userfiles/files/5522629523.pdfIn PDF document text
- http://architettipassarinmarzotto.com/userfiles/files/96805060147.pdfIn PDF document text
- https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/475725347.pdfIn PDF document text
- https://ckfinder.pamlskovnik.cz/ckfinder/userfiles/files/dilalegosote.pdfIn PDF document text
- https://simbotour.ro/ckfinder/userfiles/files/98744035690.pdfIn PDF document text
- http://carrasvilla.es/uploads/files/85820459886.pdfIn PDF document text
- http://dsraxys.com/uploads/66680541871.pdfIn PDF document text
- https://basalyemek.com/ckfinder/userfiles/files/xufosuvukusuleletab.pdfIn PDF document text
- https://thietbigas.net/media/files/73944736556.pdfIn PDF document text
- http://precedent.by/_newsite/images_from_html_editor/file/64595238268.pdfIn PDF document text
- http://acudrved.com/ckfinder/userfiles/files/65246757889.pdfIn PDF document text
- http://vivo-mebel.ru/upload/file/19695200597.pdfIn PDF document text
- http://pietroquatriniarchitetto.eu/userfiles/files/bemokarutajukeris.pdfIn PDF document text
- http://njuhome.pl/ckfinder/userfiles/files/tiduwurijopetibusi.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_off0000b1e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1E1	10828 bytes
SHA-256: `13afc03b3249fc13e9faf70c7dab5d6491734c0ea7896c444ffefbdc020000f6`
`font_01_sfnt_off0000caaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCAAA	15904 bytes
SHA-256: `faec56db4de20fa1c4c21964ed250e20c7010513c2730feb8ad9d06952e9353e`
`font_02_sfnt_off0000f362.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF362	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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