Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab129bdd3f3f0a85…

MALICIOUS

PDF

84.1 KB Created: 2021-09-07 20:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b1ce97e57e2cce76a4ebca88829739ce SHA-1: 247735cc962021c5b8b144fef4cd3434b7efc51c SHA-256: ab129bdd3f3f0a853de7e40d7b00f3d5c28b708f0191addf8fdfbd35f864e0e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=edema+pulmonar+neurogenico+pdf PDF link annotation
    • https://lanegarrett.net/userfiles/file/44782496513.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/74dcfb2161ec90b8b61d08badcf5c34f/raferiwiniwonurafej.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/defasurolo.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/figanujatovi.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/73093120822.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/h8ps7nqijnigrimikcmegbiti2/bonetomuxijiduzazopotup.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///11812941688.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/sagbpre5n5c5p9ceg9blacrovk/dotaxuvufi.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c97fddecc---30297366858.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/7c3eb03a37324d41515d1f8f2716f3fb/56916177804.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/magezelotetolevewugaju.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab8e1990ee---56478964868.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/56385709051.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/javikozitetovi.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/28110962753.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/hjh1ud7lrfvuin0so1l1983pc4/50111927078.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/ketugivifoforudi.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/davowigivonadu.pdfIn PDF document text
    • http://orthodoxnews.us/file/dubalixugi.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/gowokuk.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/14256299378.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/bewegatigasodo.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc59f1f31b---76938493155.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/73522715330.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/92977787480.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_off0000e07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 18952 bytes
SHA-256: 91913d0526daf6ff98384065d536063625209822de84d03536637b4615a5b3ae
font_02_sfnt_off00012a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A45 10780 bytes
SHA-256: 0be73a4ba6e45936a1b1dfb22dbf004f0c63213d1831411cee08296c925c5f65

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