Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab119e0d12e9c5e…

MALICIOUS

PDF

85.0 KB Created: 2021-09-14 10:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aa1f458ab62f152aa828ba35666139d8 SHA-1: 54303498312313b02ee903c393aeacf0276ce941 SHA-256: 7ab119e0d12e9c5e902eb33a52a9312116a79760d920e29b8a0d4d3eff9e3016
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous links on potentially compromised domains supports a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://titadoorbinhduong.com/upload/files/zopusejamejowe.pdf In PDF document text
    • http://shipagents.nl/uploadfiles/file/22614078106.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/sazavunuvajokoxafekuxe.pdfIn PDF document text
    • http://climtech.com/files/files/poxafodebini.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/q8qgigb6ejmbm48m9qf943k001/94306592982.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/80860210279.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/41577659909.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/gagixivoxelexusepenuvagib.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/63485027687.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/zutivunama.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/sasasetime.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/lodowafetubasaxipijosu.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/8ba851762433249a83be6eb008ca0568/sotatov.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/46843684387.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/susagif.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd8c16b3b0---39173096112.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/voniwug.pdfIn PDF document text
    • https://www.confirmedtour.com/files/55187909609.pdfIn PDF document text
    • https://kimansion.com/uploads/file/76970394282.pdfIn PDF document text
    • http://noelex22.org/userfiles/file/powanedovirili.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/4276650869.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/58559784504.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/wezigafukore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+naruto+ultimate+ninja+heroes+apkPDF 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_off0000e059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 19856 bytes
SHA-256: c5a25a7a3fb5a78a5db2318b9efb02c7f99be3b83139c10cee9e5e48c124121d
font_01_sfnt_off00011473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11473 11068 bytes
SHA-256: 12a05687805f0571ebd9a789b48e36a9c989341b9e4888cb34aeeaeaf8d492aa
font_02_sfnt_off00012e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1