Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3c5a90e2f8a66a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 20:37:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0b3027bc69003240cc880ac0f5617963 SHA-1: 73e939c020385394859cb5be0324805f95e840ec SHA-256: 3a3c5a90e2f8a66aa0dca63eef353d470390ef928e4d7dad3c1811312169c7bc
156 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially compromised or disposable hosting suggests an attempt to obscure the ultimate destination or evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://weddingitaly.jp/images/file/53850106752.pdf In PDF document text
    • http://bjxbw.cn/userfiles/file/25974495830.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7f0be9df0---98741936916.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/70747149446.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b542b11cab8---84399966949.pdfIn PDF document text
    • http://ruihuitax.com/files/file/nodixinesalufudofivox.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/35586123942.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/vinuwipufiridev.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d50594942b8---pomuf.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/45973460252.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/fr1j77pcc0di29ssejpsk1qke6/xalijupodazade.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/44841019751.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/xelumunozabofuneramidukuf.pdfIn PDF document text
    • https://ocw.tw/uploads/files/74047459901.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c37951c7---soxenovo.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/66b63b818bbb465365d1378bbb164457/73594520058.pdfIn PDF document text
    • http://derma-dts.de/files/file/45748954369.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c699310955---josepodukovukefufofovu.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/jixodewulera.pdfIn PDF document text
    • http://berbun.com/user_img/file/lurala.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38793bd93---sibevebovawuwijijesereko.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607907d20a5f0---lumowala.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+thrill+is+gone+guitar+tab+pdfPDF 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_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 17500 bytes
SHA-256: a9169ae6e0f8f95851ce17332f250fa2d039b824f71a42611783f817baba91f0
font_01_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 10980 bytes
SHA-256: 57769299a94719b94153140d883c1f14e99b20ef1b6996a3b02e28a32692af33
font_02_sfnt_off00012c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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