Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e25c867049057a8…

MALICIOUS

PDF

173.2 KB Created: 2021-09-04 03:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 832b5c95a5a1e13126b800f3a388638d SHA-1: ad94667884afe30024185f2aabcd96de07ab441a SHA-256: 7e25c867049057a8f9ff398342c99e31ac2c67e66f6366e088fa0ddd48ffe062
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable domains, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the heuristic firings strongly indicate a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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 http://llux.vn/uploads/files/5167800460.pdf In PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/56ccf7f2ce8dac92e7198f553eb57706/55824617462.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/80c0adcd9fdcdb49c65b4af3d3b5e760/69269900086.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110920626530---5907901731.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/23134876348.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a367adf0c4---51959695629.pdfIn PDF document text
    • http://sjanzee.nl/file/mojutizutirizito.pdfIn PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/92324360542.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8a91c2bd---89506127239.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/bupabapalago.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///rofeworabajotevikav.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/72978387951.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e66841e1dcc---41556047972.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/majufikedubewuwebedewiri.pdfIn PDF document text
    • https://windsbs.biz/files/file/kaparonisabe.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bf05b68f5---30609422043.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20c1aeaed6---fifage.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/52388372546.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/nukuvizagibotewo.pdfIn PDF document text
    • http://full814.com/upload/files/81401405902.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/jegiguzitararot.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/puzijazuzugis.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/pelafozofulesulamisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=bhagavad+gita+sanskrit+with+meaning+pdfPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F66 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off00023763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23763 11076 bytes
SHA-256: 8185275e062335cb05593ef85dc4d0c1e5a18301d6d9d1372457d8b8738d1471
font_02_sfnt_off000250ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250EA 24028 bytes
SHA-256: 7688806904e5748c35ef047b1129e5f2f15d6f80f375ea3ccccc656167794b69
font_03_sfnt_off00028db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28DB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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