Malicious PDF — malware analysis report

Static analysis result for SHA-256 daba785ed4318dae…

MALICIOUS

PDF

90.1 KB Created: 2021-09-02 10:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ae646ddd30b6f13726d7436fc81f1e97 SHA-1: a94b06b01f43681b61edec8610dd762f4c79d085 SHA-256: daba785ed4318dae013fd7fb29cc0ea5009c12e2335ff1378437b25fd6bd5955
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 6

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=house+in+south+west+direction PDF link annotation
    • http://ranjitabiswas.com/userfiles/files/linuxekumodonigu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b724fee7c72---62406250410.pdfIn PDF document text
    • http://goref.ru/files/file/popadojodinakewosenewure.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/14523458369.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/39084643917.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a1bc109c---nixokewedulirow.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/4t5mjt4iima71t52pepj4pcfaj/37716889066.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/22518914552.pdfIn PDF document text
    • http://goodmax.ru/i/files/98570078701.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/6984208030.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2779952b2---gimoxegurunugi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f94ce5247bfaa2a2b886ca90b9789d89/kerejeba.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/457586a4vjdn5ep1v989bu95p1/73488618701.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/getamifetelapi.pdfIn PDF document text
    • https://congchungnguyenlieu.com/uploads/files/loreroguvaw.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/43302557472.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/nubavif.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/5411389860.pdfIn PDF document text
    • http://nenayu.com/filespath/files/20210901195714.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/46863601565.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f02f81ddccd---raxupalolu.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0eaa7e3437---30952830487.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/felakirikubeperubivorutig.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/29649012920.pdfIn PDF document text
    • http://marymo.ru/uploads/files/virunokegufiwef.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/xidemaxiw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 10436 bytes
SHA-256: c405de4365b2772d1c69165e96ce8ad495b0b823e88022918f28b4a39abd563e
font_01_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 18700 bytes
SHA-256: 6c299045cd9c3749aaeb68eac35637ccd95d5b3c0b91797ff86274ad8ac57b39
font_02_sfnt_off00012b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001432c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432C 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d

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