Malicious PDF — malware analysis report

Static analysis result for SHA-256 562057221123e7b3…

MALICIOUS

PDF

86.7 KB Created: 2021-09-17 17:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9a6dc3bc76599d614b2f8232a395dc5b SHA-1: 8a1e178bd2cfdccb9dc6ab4918ace6755cb3dd3b SHA-256: 562057221123e7b3524a5b095223b908720bdfcbf6f0448f00562a9c8df84f69
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of these links indicates an attempt to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=galaxy+a50+android+11+update PDF link annotation
    • http://montaze.org/democms/userfiles/file/62680096632.pdfIn PDF document text
    • http://grabnerestriche.at/wefututejipaguzajadoven.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/161388bd475d9c---jukodetololisewavexoxa.pdfIn PDF document text
    • https://terrebleue.org/userfiles/file/duwatizoputorurik.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/42544205508.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/noroguze.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/gitevufezasifexamitimejom.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/xipovenejudegon.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea16a52e77---9104618802.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/30393609480.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/32914275186.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/vevinizoxajifujif.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/jaxotumebojozol.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/38697511270.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/23142065251.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/jofanozirunab.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/89765123372.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/35440069282.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fa40bbed23a8384fdd154c597e3945f0/sozebozilataxibezujotege.pdfIn PDF document text
    • http://parfumland.sk/upl/15357716280.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614418c85c64e---xugoluwizasipap.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/ximeluvaforebegijalupomo.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/84487818957.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_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 10880 bytes
SHA-256: 536e70f4362c7337631e728ff918ccd9f798fa94596885f89c083d64cd48d9ad
font_02_sfnt_off00011bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCF 18648 bytes
SHA-256: f81d3899849051099aa685f59fa22ec35cf998422035d12cf91eeb6b904b0c1d

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