PDF malware analysis — malicious · be29cbfa822cd7f1

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 14:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 944bb15e6fc864d06544be92f51aab45 SHA-1: 795c4e66984302e1a9305f9455f3d2c7342ad7f8 SHA-256: be29cbfa822cd7f1962488f09bd190d1d5a95453994c45cb2d316a978695f070

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous external URIs, many of which are structured as link farms with deceptive UTM parameters, suggests a phishing or malware distribution scheme. The 'SE_CALLBACK_LURE' heuristic further supports a phishing pretext, likely aiming to trick users into clicking malicious links or engaging with fraudulent content.

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://drafthe.ru/uplcv?utm_term=android+mario+bros+3 PDF link annotation
- http://hepiran.com/cache/fck_files/file/xiwagalorapemuvarare.pdfIn PDF document text
- https://www.fangjin.org/ckfinder/userfiles/files/59663299384.pdfIn PDF document text
- http://eltprof.ru/userfiles/file/20567246090.pdfIn PDF document text
- https://ltes.tw-goods.com/UserFiles/files/67681105872.pdfIn PDF document text
- http://1carl.com/userfiles/file/65820673856.pdfIn PDF document text
- https://e-midas.ro/files/file/losepiz.pdfIn PDF document text
- http://senvietsystem.com/ckeditor/upload/files/21784361971.pdfIn PDF document text
- http://jtylek.pl/Upload/file/desazukusaxipadofabew.pdfIn PDF document text
- https://coverline.ro/userfiles/file/38424302730.pdfIn PDF document text
- http://jezirka-biobazeny.cz/UserFiles/File/bibalawumomatavevitubufim.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335e5b57dd5---naxewerobadu.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/wezawaba.pdfIn PDF document text
- https://leganordavigliana.com/uploads/file/54365401562.pdfIn PDF document text
- https://aaaxxion.info/images/file/76311602204.pdfIn PDF document text
- https://b7b.reviewz.eu/app/webroot/files/userfiles/files/38051980163.pdfIn PDF document text
- http://jinwoosmc.com/userfiles/file/18559203706.pdfIn PDF document text
- https://padservhosting.com/userfiles/file/62270409419.pdfIn PDF document text
- https://hinodecoder.com/userfiles/file/41128201025.pdfIn PDF document text
- https://www.lipca.com/ckfinder/userfiles/files/92097585930.pdfIn PDF document text
- http://ghefootmassage.com/fckeditor_userfiles/file/musixevo.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1614211eb5890f---62318637691.pdfIn PDF document text
- https://abisspaandboutique.com/nbloom/fckuploads/file/belesinuxuboganilesoname.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_off0000d4fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4FB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ed12.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED12	10424 bytes
SHA-256: `7c42d70b887305d7bf4e09b14151843d46f5f8c87ac2035ef2dc039795c58736`
`font_02_sfnt_off0001049b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1049B	18124 bytes
SHA-256: `a2350e6b7c7f3e2e600ce7c7fb04c8883c7da156247f670c204a6ac78aef2fa0`

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