Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce5f157e268a76b…

MALICIOUS

PDF

88.1 KB Created: 2021-07-02 06:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e97f5f54eae04fb8247c240ec52cce9a SHA-1: effd077473eaa890ee1d0b8c2d92b0d093490795 SHA-256: 1ce5f157e268a76b22da5e63ff5f4ff1786289eb86d0c2b4a325cfdb85b991d0
176 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely part of a link farm designed to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd819aebdfa---rogadusotimupefezofup.pdf In PDF document text
    • http://fedoro.ru/upload/file/gezuviravamamawar.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160746ffa38264---legekenifutomudokepa.pdfPDF link annotation
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e2b86694---visajigenokebijus.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c302919951a---bopovoxipifuwavolaloravit.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8d01a5bc1---54453202170.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160aa89431cefc---fojizexunubinifigi.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/wixafeludimefowizu.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/fujazuje.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/9494424738.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/69506555117.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff5375e7a1---23307672946.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081504e29440---wokopimaribewilevaveja.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/sidibudemugojowagigu.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d66aaaf34910e3e90d21f1935c807976/54238182084.pdfIn PDF document text
    • http://talleresjpg.es/img/file/tujujoz.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/50739312995.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2b270f9d7---84352956504.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/ximazoped.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d25727bc40bf29054fc038eb53fa4398/zelajarujogunabanedov.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/menerujogeji.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/89cbf2ebbba21588caf813fc2988e9b9/demeputivi.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/lowiwosafukuki.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16096e714f2954---94794409809.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/073gpb70f351e7rgktnnuk1tj0/ritowudakilimewuwubiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=persona+5+royal+all+crossword+puzzle+answersPDF 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_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 17384 bytes
SHA-256: 08db33a67f2f4082381459211181ec2debfcef0e197df5121908dd3864efb484
font_01_sfnt_off0001217c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13993 10812 bytes
SHA-256: d64ea113feac3465d0430c78ad29931aa7eee3826222217b0056148aed380435