PDF malware analysis — malicious · 8e2442bed23f6dd0

MALICIOUS

PDF

76.7 KB Created: 2021-09-17 15:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 031531d00ea7e767c678cddfd06fb880 SHA-1: 5332fdbfffe16accca8107151dd5b1aca8b0b403 SHA-256: 8e2442bed23f6dd010ef56d21d039aed795c1c6c340d9d22e94198aa6701d57d

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm and a callback phishing lure. The document body is heavily obfuscated, but the presence of numerous URLs pointing to compromised CMS uploads and disposable hosting suggests an attempt to redirect users to malicious sites. No scripts were extracted, but the overall structure and heuristic firings point towards a phishing or scam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://coretry.ru/uplcv?utm_term=best+way+to+send+files+from+android+to+pc PDF link annotation
- https://romalasergroup.com/userfiles/files/sixeliramexa.pdfIn PDF document text
- https://habibitoursegypt.com/ckfinder/userfiles/files/8418268738.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/d232bd9122eebe10cbe6f73679df9989/63780169806.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311ecd06807---25322638997.pdfIn PDF document text
- https://juvelyrikoscentras.lt/Files/file/pelafepibidaxikop.pdfIn PDF document text
- https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/5895523543.pdfIn PDF document text
- http://ventilatoryzlin.cz/images/file/rijukegigubizirubilet.pdfIn PDF document text
- http://kp-technik.cz/ckfinder/userfiles/files/39479767980.pdfIn PDF document text
- http://kipia-nn.ru/userfiles/file/ziwuz.pdfIn PDF document text
- http://globalcentral.net/contentupload/fckeditorUploads/organization_/file/28366935231.pdfIn PDF document text
- https://www.thaiahpa.com/flash/files/23364257533.pdfIn PDF document text
- http://aczelzalog.hu/tmp/54032044868.pdfIn PDF document text
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142eb050fd52---larevukosob.pdfIn PDF document text
- http://changjiujz.com/uploads/files/202109140734102267.pdfIn PDF document text
- http://mtt-association.fr/upload/file/julowupikurenorijad.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136cec32c36d---82731926956.pdfIn PDF document text
- http://change4best.ru/upload/file/71109338421.pdfIn PDF document text
- https://kaptenhoki.info/contents/files/tetumugomafiredofiwe.pdfIn PDF document text
- https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161397dd738636---tipufisigoxi.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/telenusoxanivo.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e9bedfdf985fe71220aef31492e62833/17884315874.pdfIn PDF document text
- http://hurtglass.pl/upload/file/xufagizekitixiba.pdfIn PDF document text
- http://vnndt.com/Images_upload/files/redemidu.pdfIn PDF document text
- http://goopenapp.com/uploads/files/7309051381.pdfIn PDF document text
- http://usefchina.com/uploadfile/file///2021090717001286.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/2396227452.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_off0000c8f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8F0	11032 bytes
SHA-256: `20ac986a11acdd3ac82ce9e093e7026c5121fa240bde222d067ea9c814a35526`
`font_01_sfnt_off0000e2b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2B9	16128 bytes
SHA-256: `1cd72a6a1db144b4464e0f691d228008200d2a22240c72e96061894e23c6899a`
`font_02_sfnt_off00010c78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C78	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.