Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f03f45aebbf4844…

MALICIOUS

PDF

85.0 KB Created: 2021-09-08 01:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f44ca3aed9b80060a542433b9eecdbcd SHA-1: e2344f36cc88a4b12f1494a55d6c32c57cfcc181 SHA-256: 6f03f45aebbf48447c73462e970f9410242a351d734fa5362a3e2c95469f8913
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised WordPress uploads and disposable hosting. These links likely serve as lures to phishing sites or malware downloaders.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/8c1b5bc60753fba47d664acf9beffbe5/59799312316.pdf In PDF document text
    • https://bonacorsi.it/file/lazizinukenujonemerom.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/rabunotutamoposejip.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/22654102551.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/lematikavegidixoxapakasal.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90936291776.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210531_809C5F46741E1E10.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/zopodesigiwezube.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/xuzonawikofoxodagusu.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/82ff08e4354d0cb4b49ca3da2b200383/wumiter.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/vuvujujepevebeb.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c25688dde---xinavixafuvogovolej.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/jifufivimow.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6355cc5b4---kejetajexakitunanuj.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085c81fd088f---sotemegemas.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210901_160252.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/15977175184.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/baresanave.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/44628165456.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/pamudowogaj.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/58457412744.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/sutolitewelijolumijonivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+do+i+make+a+pdf+file+smaller+on+ipadPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10728 bytes
SHA-256: 89ad274d41727c79d6ab80563232554c00d7d629d5e0dda29f919290f44404f2
font_01_sfnt_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 18264 bytes
SHA-256: f0b8dee5fe2f4ee534409743eb2bb33afcc7b7a4d4f0327d83b9270ee81ac8a1
font_02_sfnt_off00012dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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