Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f84ac0544f545ad…

MALICIOUS

PDF

82.4 KB Created: 2021-09-24 12:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01b3997c5f50f83cf61a2ac376923aa1 SHA-1: d5a84ba99a541ad61b02a4abf4c4e398498b7368 SHA-256: 2f84ac0544f545adfb074aa077bffe6fab1603d05f95bb27f1befd85f69b8434
176 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. Numerous embedded URIs were found, including links to compromised WordPress sites and raw IP addresses, suggesting a phishing or malware distribution scheme. The presence of these links points towards an attempt to redirect users to malicious content, aligning with spearphishing and malicious link attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://elitk.ru/_files/wuxogeluzajojokoterowek.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1614b04dcef433---gurusadosobegizonotigi.pdfPDF link annotation
    • https://4of100churchstreet.com/assets/media/files/69979424429.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/16694118877.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/46599944447.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f3bdd6186784e1813c2715ddc783500c/39375930747.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/boboromefipogel.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/balemudazaraf.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/fuhdi8925eb7kndsrprfctt8a9/wevuzimimowagug.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/dewujaz.pdfIn PDF document text
    • http://m2m2design.com/userfiles/fomokinogigomobakuvod.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/90308999552.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/64607629244.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/72641904529.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/xapinitiwagezaduvuxiz.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a17cd588db---39563550716.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/jorukojo.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/jozonabiwo.pdfIn PDF document text
    • http://195exim.com/datas/files/kesisanememavi.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/tepajulere.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5870982b---1898491507.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/89130629703.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/15724190304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=mobisaver+apk+downloadPDF 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_off0000dbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 10664 bytes
SHA-256: 67bef395f4f76144dadc696f61144ac305ace9c64efb662d99239a6c599d95fd
font_02_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 18608 bytes
SHA-256: 01a322ac405663b8dc285121104561f8dc32ef0699dfa4a563ff9ec0ce32b5eb

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