Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ade6c607d165b3…

MALICIOUS

PDF

75.2 KB Created: 2021-06-26 07:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 068a89505fb1ab2886ec868c88545a3b SHA-1: 18996700c24dcb7961988dc2443c52675dfd929b SHA-256: d6ade6c607d165b3b3e3b121c9f801cae00c7c0d03635a2911039c9cc2400978
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. The presence of multiple distinct hosts and the use of disposable hosting indicate a tactic to evade detection and broaden reach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 https://autotrans911.com/thread/admin/uploads/file/28643600725.pdf In PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/073fdaaa15243db732644bdd8f253ee9/javepexew.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/jipubenebibokukaxasuketo.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831ce41d0a2---vurotugofazijarasexubex.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c5417fcd8819e8fa2383566ce75302e2/puwaredad.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5ebbf8b9---58191367154.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/edab45f2bd31a66e164d536a2caf8da5/71398283212.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/7da362f866072bee690ce3b21cb39949/jevomenibajirupa.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b34050476---vamoxo.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe43627151---jibozisigunulevimijevi.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/benisosesagenogiduworimop.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/rubenowevutu.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f14ec439ac---53670537292.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/962384777b397ee0deb3947d225e82b7/66923289320.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/62891669454.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/53235540531.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919eb437758---95582081566.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/50797807927.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab59cc31d0---ganidetisepowasajapamovow.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/xunesaxuferumaxo.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/8c42ab2c6b432028eed91f8f8c8cc14d/69891178513.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/tupozemosoxixivadom.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/44791487745.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b97505a3231---38248684822.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/42951824725.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c77f809cd3d---33500356367.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/90715139666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=i+will+never+hate+you+quotesPDF 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_off0000c355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC355 16892 bytes
SHA-256: 807aaaa843703c865d7e993afe45d4b3a19c3c339047ba19e34ad2c645aabafa
font_01_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 10668 bytes
SHA-256: 648c31995bd4d8d1af4c048c39b94e25f43f159c13f81ff325e4645e816de9d8
font_02_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1