Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce77e35241bc6e2…

MALICIOUS

PDF

90.2 KB Created: 2021-07-07 01:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 285fd8190773236230867ec46ca2aff2 SHA-1: d9d347d977be8b7aeecb0ce1c2a0fcccd3aac9ea SHA-256: 5ce77e35241bc6e29bc39acc1aebea383fd54168848f07d6895be778a226cb58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it is designed to redirect users to malicious sites. The presence of embedded JavaScript, though not fully detailed, further supports the likelihood of malicious intent, potentially for downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=phineas+and+ferb+in+tamil+full+episodes PDF link annotation
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/mdjid3lvs90bjtbb6jnichbr00/rovoluzisamo.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/71qmrse2l0cqlm9ijc1b3m5vd7/83146186553.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/2d1fa8f610cf8ffce1179bc859fd2177/budoxazo.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dergk276vlpe66181r9vlcmqn7/fasixugatagedikarudino.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/85765063920.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d273b4e3d09---97146202181.pdfIn PDF document text
    • http://caramelitos.sk/files/tivapozijesivaxuxaxo.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/sumaxisudagevinut.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/56733976760.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64ee38676b---62829637586.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/73919032502.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160843faca276e---61058417316.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/10ikc4gv7lof6blc48f2gcon49/42179501402.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/kojufobilevuzof.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/32154853329.pdfIn PDF document text
    • http://erdbau-rauch.at/98498539850.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/fc166c5bb3e87e1e36bba9f85a8c967f/71768399369.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6bd8725efc375c29695b2148b06daeb0/19830254181.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/fosubuletugol.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 11004 bytes
SHA-256: 000902c59cb237dcf37cdcfaf0140ca3a7272877f41a056b28d80cf2d72c3a3c
font_01_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 5864 bytes
SHA-256: d81dd82a6a1a4129426be96d99bf8603b1da95966b6e1c4ef01669e6da8c3212
font_02_sfnt_off0001137d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137D 18652 bytes
SHA-256: 691fb72dd27dbc24b532e67a82b2fc321c9fdb898505226f327f2d49c4b9540d
font_03_sfnt_off000142fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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