Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef2b5298b7ac50b…

MALICIOUS

PDF

77.6 KB Created: 2021-09-28 05:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: aeba1e5ac64360216c40dd851f33485c SHA-1: 985f3060a36a9a2748aac23ae70159b52b289594 SHA-256: 5ef2b5298b7ac50bcd6e36833a7ccabe7555d83e2ad667f953ce9814f21537f4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://wastran.ru/uplcv?utm_term=intelligent+investor+pdf+latest+edition PDF link annotation
    • https://gopherscopes.com/userfiles/file/pivolano.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f2887d4faa---noxumozomukoxumal.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/21636650508.pdfIn PDF document text
    • http://tsmsaldature.it/userfiles/files/41937562250.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/desupulazotilif.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/40229103039.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/rixuwagabogi.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/dimogobot.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/kapojewelazejadidego.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/87128370328.pdfIn PDF document text
    • http://khocabien.com/uploads/files/79557504794.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/56244160056.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/fotoxew.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/60932403304.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/mugedi.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/5b20b7b9d8d062ff7b69a271bf7b8055/ruxosab.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e753f8c45a---xonuwetirisewigukawosuji.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/vozanaxudoxek.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d743461271---37222731104.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210925193222.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/moligavutuzekamelazeb.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB305 18504 bytes
SHA-256: dce28b2bceca55070e27751115795a1411dd5e1030a606fbc0b52342d85b07ec
font_01_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 10688 bytes
SHA-256: 18118f09903ab64972d8c3de1e37d3ff4465c069241c44b53a8a19aaaf5c3034
font_03_sfnt_off000112a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A0 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684