Malicious PDF — malware analysis report

Static analysis result for SHA-256 1479338035b58df6…

MALICIOUS

PDF

89.4 KB Created: 2021-07-24 07:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b6a885869a3c3036cbcd61fcdab4fab5 SHA-1: 3598620096b2b6fd6d3120c5159492d9560a368b SHA-256: 1479338035b58df6c4f56217d2b47bacfc8d4f1bb9dce5ebf8a46c418049af0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous external URLs hosted on potentially compromised WordPress sites or disposable domains. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to lure users to malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://canionglobal.com/FCKeditor/file/vodagofezojewadoga.pdf In PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bc30867c7---sivafaba.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3be15a6e6---dedekawudifesaruwemi.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/29400315541.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/pijen.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/mimuzomupajoweb.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/82338313327.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/sjru5e66f2aihfri5gsi0rjnmt/xitubotolor.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081570f28a3a---latajaxa.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/jenajubarujofemam.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/72c71c7fa6229d1a3f0231e8f420e261/dijobamikugadetog.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760eeb01049---xebafosiraku.pdfIn PDF document text
    • https://latework.cz/soubory/78978746018.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090bfa101984---bewugiwuguwigowaz.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/79277679594.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cd3579ef8---70098990951.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/448364132.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fb64413b3---letazufukesodexelilup.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/bopagukugejemotawezoj.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/l22i132nm74mjd0f2k0cmkd2kf/jusejas.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f54ebb2a49---86025778685.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/e7758dbad98368f1c9c84b1a014c91b1/29664977002.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/56685618868.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210521155543.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29bd5619a---sekumikekekenixuxoxebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=praise+and+worship+songs+mix+mp3+free+downloadPDF 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_off0000f845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 17096 bytes
SHA-256: ac4c027dea8f840311cae023d086a459b6748d2aeb1dfb08447354c2279846d9
font_01_sfnt_off0001251d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251D 11208 bytes
SHA-256: 6dbaba0ac8f58260c3362c3d1301f76f177f8d1b28ca3b99a97eb84eceac3673
font_02_sfnt_off00013ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1