Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f4686b09b5e1b4…

MALICIOUS

PDF

92.6 KB Created: 2021-08-12 19:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8815effa6edf500ff30c7b4699909e0e SHA-1: 212c38c40cd2732abe2271cb6b95ebb6eb387ce3 SHA-256: 48f4686b09b5e1b425b499b0074db95ea2bc97ec62e9d9c1fbbe60c163ca1037
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries to trick users. It contains numerous links to external resources, many hosted on compromised websites or disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://drafthe.ru/uplcv?utm_term=how+to+paint+ikea+poang+chair PDF link annotation
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7c8fb2a355839573563e232dafe3b26f/47096175543.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/jeruwagalafadajixara.pdfIn PDF document text
    • https://argumentua.com/i/file/pofepebomed.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074186358757---38566234114.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821b54d8193---zewabute.pdfIn PDF document text
    • http://allasclub.com/campannas/file/13545262079.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/aefd0fdfadf7dcfd1f2dba0cafabd5a1/43939289543.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0a740d9f---wejoleboxopasodokab.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ae7e4f1f3---nejedakapu.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/72157221417.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/8pjb6gfju6be38nienj11cn4e4/6959590757.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708b5b5f8ad---21112101202.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba43d529742---sufilegogomi.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/kemoveratugevule.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/jugimedunodoruwazovuxor.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/7005284233.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/a649b4fee491c6b46db0436ec1084caf/71429774159.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a2d831cb4---54699202304.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f47ee7320---davijezifipuk.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/21466585375.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/sobubopupijipi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5dfee09b3---25404790466.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/79245335487.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1042f08417---303820442.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/bowezuvitelela.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_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C38 10608 bytes
SHA-256: 884835ad6410bfc04915fef313fe35113093c3008a49b8b71e9dcda11cf6eaa3
font_02_sfnt_off00013470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13470 18056 bytes
SHA-256: 7a9debd4f6b1d56d22b629b1379aa253f946e12b63dd3087222e937ff76f03e1