Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc7591afa25a1e0…

MALICIOUS

PDF

88.5 KB Created: 2021-06-29 03:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6f4686bd99417e567d1d4ef3997a89f7 SHA-1: 177414a7266bdac11399809ef0620bd07a6eed11 SHA-256: bcc7591afa25a1e08250898b15908d5b22834d04272a511d17afeee2666b95d5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=real+steel+movie+download+in+tamil PDF link annotation
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/c81e3f7d906eecbdcddf7d98092b6b78/basifenidudelad.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/34203573049.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48f819fb29---1836585100.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/vupamoz.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/53478912328.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/61449448552.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/81122333914.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5ea84809649286e9c2b7c63fcc3e23ba/nonitolokukekikexidatoja.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081f4e4ed3cc---11318895718.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/bupewepiludulotidasigo.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0037f41e3---14351867985.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/675bf8f26c17a0b85bb5775f47d99b2c/vadesupa.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a93b8286f1---saligiwosaxerusiduze.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/matosawugifabif.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ec4812c15492c065a12ef1c1e9ee3c3d/22408005466.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/xaxiguzamopanel.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/4a91ffabec1a0873120269da47c0939e/70181081747.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/6092medri8ohd75q0as4bont9v/77658977014.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607e000dc985c---resijikaxabumat.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/44008127909.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gmukgj8fa4179lgj374ntgd0c0/balakobafedel.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/77246929359.pdfIn PDF document text
    • http://hotelsandmartin.cz/files/file/luxuvuravibofiwaxewavam.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.

FilenameKindSourceSize
font_00_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 16988 bytes
SHA-256: 67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
font_01_sfnt_off00012490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12490 10504 bytes
SHA-256: 43f122fa5581a1fd4778734ffec8a89c27f1139cfbaf1dcc432946c660633924
font_02_sfnt_off00013c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1