Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb182aad237f06f8…

MALICIOUS

PDF

98.4 KB Created: 2021-09-05 21:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 33a25d7a68d95881871a9291119a8ede SHA-1: a3ffcc9d20b78aaaa0cab57cb94f420774bd26a4 SHA-256: fb182aad237f06f88d0ba06ac82a524ff1295a83af96207220e025c1ce94b15e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic confirms it's a credential phishing lure impersonating Apple. While no scripts were extracted, the document contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sonos+playbase+manual+download.
  • 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://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/89df2d5e76c72f79d49071a306e54fce/wopowogiva.pdf In PDF document text
    • https://condominiovillage.com/userfiles/file/6349694062.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/zojewaje.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608078d1a2b5c---17151700715.pdfIn PDF document text
    • http://djapm.com/userfiles/file/66381509214.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/g3gccotbgh8fi6dbbcbhjv7q2j/10094551574.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/15/file/20210515_080822_138.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/gazinux.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d687d859a7---9379941566.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/wujomuj.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/38192372694.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/disigubojemupegesorev.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/juxinexufopumaneduwarotu.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/towujolozagada.pdfIn PDF document text
    • http://scpt.it/userfiles/files/datizenexujetekisexomeked.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca657a7152---13585398749.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd27784308---10997500784.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d440ef7248cbbd7a401612589810dacb/defonewepadowux.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e61f0c3f86edf5397c21510e29171718/nademepogubafevirolexan.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083281ef1b86---wovunukewivaluribalepi.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/limamigukowifuwekodadokax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sonos+playbase+manual+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_off00011d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001351c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351C 17756 bytes
SHA-256: 3737d81a97385469c29d92f65c5c68bcac99396c8e8b608130ede7205cb07e87
font_02_sfnt_off0001637d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637D 10780 bytes
SHA-256: fcb449a265b812727ed83170b2f22e528d3be02bf4b77ef4b5c438352e181333

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