Malicious PDF — malware analysis report

Static analysis result for SHA-256 1568798ca101ebb1…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 04:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 364be5a06fe75617efb2ca8cb2befae8 SHA-1: 0acd7903986ad70cb2ea99956b6fb0caa5d40a62 SHA-256: 1568798ca101ebb129bc2f0e26fd47986ec8fe8369f4d9f7e7bcaeff0e6f216a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The presence of these links suggests the document's primary purpose is to redirect users to external malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://crysiq.ru/uplcv?utm_term=share+location+iphone+to+android PDF link annotation
    • https://seltec.io/images/uploads/files/tosepisopotoxabu.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/gemisexapif.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/762c7efb59b35efe432336b8815dc63f/84476451587.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/23724825301.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/39537129253.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161350d3c9254f---womupoxaseterodine.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/63674774973.pdfIn PDF document text
    • https://blv.by/upload/editor/files/genofafojufawa.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16140e74d401cd---soputopebuweliti.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/88032608700.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/70455089787.pdfIn PDF document text
    • http://clerus.hu/files/file/resemulebuxalidi.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/dinagiwebopepanadogu.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/86419778653.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/14071483962.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/kowofamo.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/wejolerazep.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/zefixaxamudipalizobulev.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613376e960129---fipirexoxe.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/74104548921.pdfIn PDF document text
    • http://stroi-sistema.ru/img/vopofuwosado.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/nexawozinapoxawogebu.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/75631526029.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/viborumimasodujifowudona.pdfIn PDF document text
    • https://nasikampung.info/contents/files/giwivojutikevile.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/0tuaqoi24flkespsl9f32ti7r6/daxikuveloliju.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_off0000de88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE88 17508 bytes
SHA-256: 3ee8ca37c3e03a88322241b108670a9f188ae4b77c7426c053b020f59b2321c0
font_01_sfnt_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 10516 bytes
SHA-256: 2a25e9f0a1620760376ad44e55040fae5055c70ebea83e1856e18b072be0b310
font_02_sfnt_off00012399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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