Malicious PDF — malware analysis report

Static analysis result for SHA-256 e578e68176c8d2d0…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 10:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: f9aa4fbc2e7db5378e0406a44bdc2f69 SHA-1: e7179eb770e82ebc4f8301eb69c23e04b2ed3611 SHA-256: e578e68176c8d2d015f9080261b6a2f66a513fe89d0db52c7da995b6b9dcd957
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. Several URLs point to PDF files hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://zh-huaxun.com/uploadfiles/files/xijulovogixuseb.pdf In PDF document text
    • https://tutorbolivia.com/userfiles/file/76314854502.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210910163414.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/keselefagos.pdfIn PDF document text
    • https://kpii3yaw3-7nc.com/contents/files/sinuwozijusopupitomopeje.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/jixaxuvosiriwulejuzefari.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/68651797228.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/bonazu.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/97471046108.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16138e2a86205f---321649866.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/gojikex.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/99177894090.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/jeriwaxavuju.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/mavuzupaf.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/86515540656.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b93c082e9---45292093580.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/85899391765.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/zufus.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/68407209578.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/14575541539.pdfIn PDF document text
    • http://hkalc.com/userfiles/nadute.pdfIn PDF document text
    • http://njxinbell.com/upload/files/jeponuvibamisawasobuz.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/36129312654.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/rnno61ismnf8iatnn17qb7krch/xokoxevanudinitalorowojer.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/bonobebabigategukonuzalo.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/23858297477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=suicide+squad+2+full+movie+download+in+tamil+1080pPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA9 11656 bytes
SHA-256: 33521727ff7296f154654616fbc57fc71774c6581de68154a3e27d362e92f8e8
font_02_sfnt_off00011748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11748 17964 bytes
SHA-256: 8a7fd6135ddd44242eae2a351e76be507d9281de583baa024f13307f0e022f17

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