Malicious PDF — malware analysis report

Static analysis result for SHA-256 30047fc5d436d6ae…

MALICIOUS

PDF

70.0 KB Created: 2021-09-02 07:38:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c205491f0598220070cb39c18461ca6 SHA-1: 7a8f06e417fd3191af34b6764bb4c6ee64b38c4c SHA-256: 30047fc5d436d6ae98291cd9d2a44d683b908af5de6a8a6b820f2fb04931a92a
176 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to hide a clickable action. The document embeds numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://adance0112.com/upfile/editor/file/girisizadejomo.pdf In PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/08ffb8fac6ce9d2142a3c67d9c774a5c/61909603615.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/50423684079.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160907757e82b3---59227767746.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210806045417.pdfIn PDF document text
    • http://balone.net/_upload/file///70919210461.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1abbe1edbe105e1d2219d811c06c9b05/75783562958.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/xugozoje.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/wanaxazomekigas.pdfIn PDF document text
    • https://cian.hr/userfiles/file/45126207012.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/sefurixajibanepin.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f45d567793a---jadokeluzonema.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabb91ee93a---41804242315.pdfIn PDF document text
    • http://hoskinspugs.net/clients/40498/File/wivoweziwovu.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/34722652553.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/befixeto.pdfIn PDF document text
    • https://newoptic.mn/uploads/files/dixas.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/85052417051.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/xetepo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/2c41b2d31aee6f8390a68c7ec233cdfb/zimafujonekagitasojuwag.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/luriwakugew.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210430212824304476084.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/jupozubasegilivajoj.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070216541470554.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/guzivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=body+temperature+of+cold+blooded+animalsPDF 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_off0000b615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB615 11188 bytes
SHA-256: 82927a4cbf2fc58f3264b4bc8155d526a3b2cfe6394fd47ccd1ce410ba7e1741
font_01_sfnt_off0000d00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00D 13800 bytes
SHA-256: 01fc6fc34b9deca397132b5b855495a7f8841241ac0c13d434b042b4e81a3095
font_02_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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