Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1c4d72be7feb91…

MALICIOUS

PDF

68.1 KB Created: 2021-09-13 04:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: cc30044add8602f540052e4110902edf SHA-1: db4088f2722211e1c0f5dc6b699c9bec5d711a14 SHA-256: 5a1c4d72be7feb91f54fac39649fd188d35e638b075737bff8e264c75f22062b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple disposable domains, with one URL specifically mentioning 'download life360 for android' and another pointing to a compromised WordPress upload. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated and unreadable, but the heuristics and URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/fb12e8dd4d518464b0c61581382a42e7/xezivinijaxuporeguwuzoz.pdf In PDF document text
    • http://japhina.com/upload/file/fewodebojifujajerigobuna.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/78391242697.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/70641324455.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/febativen.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/movusas.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/19d395d99a2fc9d587432459c913fe97/pefolobejaniku.pdfIn PDF document text
    • http://rococosofa.com/files/files/mebupewikejikujeremilufa.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/relewaritol.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/6141422302.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/zozaxes.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/fanikedezibawijebusotep.pdfIn PDF document text
    • http://gensugroup.com/upload/files/60026089699.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/55025044944.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210910_041729.pdfIn PDF document text
    • https://casaalu.com/luutru/files/25845499968.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/ribur.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/66890633163.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/metob.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/2fc35778e1d1aaf5ebc7de830f9a464a/85498867561.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/pozatukedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+life360+for+androidPDF 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_off0000ae6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6B 14352 bytes
SHA-256: 54e10c428656d4cc14004dfba8b0c04a7e9d7d7382ece19189cb4d44d0d3873b
font_01_sfnt_off0000d267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD267 10632 bytes
SHA-256: acd3e6a6bb5963c0828bb9b6486e16b01bcfeb5c75e59de779d84131ea66047e
font_02_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1