Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0ed2c70c05d33b…

MALICIOUS

PDF

118.5 KB Created: 2021-07-13 22:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e954e1267badb4862447742b3a40ff74 SHA-1: 31624d512f7564c1c1179fd5554f259758b0ae35 SHA-256: 3b0ed2c70c05d33bfe11dc89987d6deb89e6809abca664776e0203e849e96f19
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/govopolejirawusoze.pdf In PDF document text
    • https://ville-saintleonard.fr/pdf/22229266646.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085c7c6701fa---94531380707.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/f0a54031e97a9fec21b3d87676754062/bizusivamexufopasize.pdfIn PDF document text
    • http://skomi.ru/img/files/file/68432930290.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752cbb289ea---zimitosimatuw.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160888f2962077---62276069851.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/poxisijoko.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078607351d4c---7351660781.pdfIn PDF document text
    • https://666666.vn/upload/fck/file/33937798445.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b659422c655---97396825445.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/164d53ae34795d2bdb4f88c067c27bb2/81255253054.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/f4c4016178754ed3d1a3ffcd74afd1c9/69205044540.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/87320748983.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/2efvvme93imdmuc62s4a054g8f/fanetesuboda.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/eedb57a3f1d79f7e842961451368b1ba/vejajiri.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/abe117a91e901183e1e55b3095146264/bivojufelozobiledir.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869ba81584a---zumijugawubed.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/20840651577.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16095aef1a5faf---5274058814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=second+class+requirementsPDF 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
    • https://www.scouting.org/coronavirus/covid-19-faq/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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15643 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E55 17188 bytes
SHA-256: 21c0ecfa4a17c9d14fcc678cdd73fbc4affdca70b3314ba5ad8fefe8cdb8b4a3
font_02_sfnt_off00019b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B4A 10852 bytes
SHA-256: 1e0a7c2490cb378b1639f2d5e9b50262f3346f6bf228912ab14339680fab9707
font_03_sfnt_off0001b41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B41A 16972 bytes
SHA-256: ab334761af9860b70d49587bb69c33904c93c1033659f064fa346fd71c252a46

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