Malicious PDF — malware analysis report

Static analysis result for SHA-256 182540795e10b996…

MALICIOUS

PDF

93.0 KB Created: 2021-07-07 03:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8cf9d65ad2c19803f85ce5bff17d8ba7 SHA-1: a605eb42ba06663fff1a55fd144173acfd0f5d9d SHA-256: 182540795e10b99624c6fb57550694003a65bea608b4fc9d9e88e288b6e332fd
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains exploit code or phishing content. The presence of numerous external URIs, many pointing to compromised CMS uploads and link farms, suggests an attempt to redirect users to malicious sites. The 'Macro/content-enable lure' heuristic further indicates that the document is designed to trick the user into enabling content, which would then likely execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://crewmak.ru/uplcv?utm_term=getting+started+with+intellij+idea+pdf PDF link annotation
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/270aum5p5i1m1m0dq8722jgvnr/xufenawedesedaku.pdfIn PDF document text
    • https://rosycaffe.com/file/71879344766.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/09dsom6891t4h7drm60k6dg4n6/53850560961.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/96421742000.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4fed35ec4---3148288259.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/mosegap.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075883aaeb07---movetopife.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/28347949860.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ba4227858---bixetiwuguj.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f70fad2aa---21324796071.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085536ba74dc---joruzulugi.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/107e2a14f5524e87275a524127af1205/91753859286.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160727097a5c1d---mijik.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0a41403e506bbd48c6c56ffe54cd9236/wiziredoduxofujazu.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/54207776231.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/nutudefodumefemurosuv.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/50905504.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c566f2b6d4b---3433154153.pdfIn PDF document text
    • https://anfauglir.com/images/file/lexufubulazekanimadele.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726d74e956c---90134442063.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/loxefufetazurokumevejewo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783c437d109---85663517666.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebe509208c---79083862267.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/28918840451.pdfIn PDF document text
    • 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_off0001052a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 10912 bytes
SHA-256: cf2e67493292d763356bea87eff735beb992c2d95d75624dfb7ee996bb215a88
font_01_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 18420 bytes
SHA-256: 01ef182f77b7f9ecaa575709858e4274894628d1b71c9373878ec11b8e85bf62
font_02_sfnt_off00014eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.