Malicious PDF — malware analysis report

Static analysis result for SHA-256 b718a0d6a82a6525…

MALICIOUS

PDF

63.7 KB Created: 2021-06-27 23:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: bb341566398149bd343be7fe183ab160 SHA-1: 4eada2e0b16a6eda410de0c3e887de3da51fdc47 SHA-256: b718a0d6a82a65253419f911ef4dd4ac4d48eeb8e4ddcfd1de0ceab580e7250c
144 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV. Static analysis revealed numerous links pointing to compromised WordPress sites and IP addresses, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links indicate it's designed to redirect users to potentially harmful content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3041ca987732643aa6f4fcb83c6c0d89/zafunikotamaze.pdf In PDF document text
    • https://birotex.rs/images/files/fobetamet.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ccab2c71---45915927927.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bd34a598679---jupajobodatuginigof.pdfPDF link annotation
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e4286ad4c5665eee600d860a08d83854/lasedodalikaso.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/70jjb72uo0ipqj38gep97nv0g7/zatokuterigodixen.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a94efc39126---72128544601.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085e9b913f2e---99448493012.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/2d51565829157bb516ba441d5883643f/81594968429.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608712877d2c4---tunawefopexo.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/nonevir.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/k4njgcvhpg4lfcee927kir623h/domerarizejej.pdfIn PDF document text
    • https://artenika.pl/fck/file/zivotubobaxejixuzamet.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/1052585094.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a100e19aa5f---vumegetofiduf.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/saratebebesegusanixiw.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160877ae878707---nagajat.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/raradod.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/wulamugasukevujerapexot.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/90371c7c5bd00028613991c8d813c1dc/51974143908.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/67416694049.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/paxukatevovajupasesu.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/17e8f7c1fdd97226fee1c4a08ccbeb3f/85645551278.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/98609830787.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbb9ae5449---36844316550.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854987eb794---35412692727.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=despicable+me+3+me+titra+shqipPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 10872 bytes
SHA-256: 27a4cda64f5f1edb22b2e8f2a1df343b43f5c490caf1f11ec388c025b355cc60

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