Malicious PDF — malware analysis report

Static analysis result for SHA-256 80772ad2101b7c6d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-20 00:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c7e7bd8586d9d37cba4b6d0bf56a354d SHA-1: 8ba7ef54e48f6a891a7a7fb96bf581b79fe95a6c SHA-256: 80772ad2101b7c6d953b60ba840b10a42293a3fe7905260c15e79e3cacf787d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that redirect to other sites, many of which are hosted on compromised or disposable domains. This pattern is commonly used to obscure the final malicious destination, often for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://laborke.ru/uplcv?utm_term=dragon+ball+z+cooler%27s+revenge+free+online PDF link annotation
    • https://1tlstar.com/storage/uploads/files/76922544469.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/wopoporevutagelo.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/mamazurugo.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/xuvotirevodidojafogowed.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ca4237827---rumeberolorusogizolonija.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/jejedufaledofowiriwava.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/75966815a5eba18ed5bae29d1cf9ae64/xoditu.pdfIn PDF document text
    • http://asqcert.net/files/files/jufazovirugamakenuxoti.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/juwenux.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/wixul.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/96fa9dae23d4cb22eaa0336e0695fb10/takolototi.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/51590182949.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/77441749133.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/wajegaxovigefifaweguw.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5ba9ad4c4---zusujadiwugufezekes.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/47963674120.pdfIn PDF document text
    • http://contelex.it/userfiles/files/42702199880.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/84107180200.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/72447246389.pdfIn PDF document text
    • http://ipceurope.be/assets/file/livezuzonuxogo.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/14141242460.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/ponorebix.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/fupolojunif.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/bijaxuvajajikutajota.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_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 10716 bytes
SHA-256: 647232d4fbc6e5d88ecdc8f6a0487f4a65ef3927843bf1d9244fc638a519ecd6
font_02_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 20636 bytes
SHA-256: 76946e6907a620de4a888a2e57c13510696de59b3eaeae069d98642cf4c73d55

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