Malicious PDF — malware analysis report

Static analysis result for SHA-256 028d7c0e7c200d20…

MALICIOUS

PDF

98.6 KB Created: 2021-06-26 21:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5a20b0759d6bf380a5be3af9c5178fc8 SHA-1: 4db65f64bc98fb109b3549c7b0ab6dab664b5048 SHA-256: 028d7c0e7c200d2077f011b7fa3850ad84f01cfa34b986935a01b6802f674b3d
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://abpaluso.com/upload/file/ferudurovimenug.pdf In PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/tavesopupuluwapategi.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/87315261411.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/sasgg41ee00t7bj0980crj9d6i/tibiwimagipujafujisi.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/78234358645.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/0365a54ec9859e706cea87e96fa701c3/lowepiwinakafojabeselikos.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a767fdd45cb7edcfa84116b4de33d685/lakonawoteto.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b65101e21b936c3a44ea572799b31f95/watovobiwepako.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0f8a2c692---78849628406.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cf3faa69e8917464d323bae3099438c4/95191363693.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607448650dd07---10163822397.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/zabiwisalirotupezaso.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/36595175300.pdfIn PDF document text
    • http://scpt.it/userfiles/files/suvowavavimomiwof.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/96c4090c08f711026dc11eea530c0710/18987235654.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/74437019497.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d4fb1363a30ec682a7cfa8f5714b211e/5959874243.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f446f308206c3b280edddea3ea29f25f/61716064966.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609465031a9bd---fetamonulepowi.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/12853202968.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092413d5687f---98739563020.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087977b050a4---98824371395.pdfIn PDF document text
    • http://bichvan.vn/upload/files/27518939353.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609634df6aa84---60294406311.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/88602013427.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878a9fb0b55---12196226491.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=local+anaesthetic+meaningPDF 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_off00011c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C63 10532 bytes
SHA-256: b3ef5981913b27e93e99ffa1204fad2700bcd6e219e3fab542a8fbd5b7335d8f
font_01_sfnt_off0001342b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342B 19080 bytes
SHA-256: b8047bc47992f99f7936a4ae9b241cf769e7751f52594cd61c566cd84bd59c36
font_02_sfnt_off0001653c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1653C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1