Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9e5fca6d077d18…

MALICIOUS

PDF

84.8 KB Created: 2021-09-11 17:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1e2d1cbadc68df1841a1644d05c2f88e SHA-1: d173b26053f88ff8458b6bea80a197aa61721c4a SHA-256: 9c9e5fca6d077d182edc4240d343070234625c3285bfa375a98c065e239c79bf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many pointing to unknown domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.lovebliss.tw/UserFiles/files/37676286732.pdf In PDF document text
    • http://dulichtantai.com/files/uploaded/files/40425155476.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/75475950147.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/45759842153.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/16685987500.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/mapelojogoxewule.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210905091432.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/tolugozeroxo.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/goboreziwokonomome.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/suzegadefaxodarep.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/juzevavetexap.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/18610951444.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/90159405747.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/papule.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/18105146379.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/69745809470.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/nexerawawemefesajud.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/sagafugutozerumas.pdfIn PDF document text
    • http://splogservice.ru/content/files/58161495214.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/lomidepasamorepajizo.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/1370747933.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/vuwovimebifepilibomafafip.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132009c27dc4---30650952980.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/gatelux.pdfIn PDF document text
    • http://byecook.com/ckupload/files/20211656245.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/38216524224.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/82200792063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+ebook+reader+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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE53 10428 bytes
SHA-256: b6355d0805bb6feccd441bf36be5df4459a732ea2d1f7249bc2b54755cdde204
font_02_sfnt_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 18136 bytes
SHA-256: a74b15d692b253ef3b3f0339c6199d854098975a64b10a317aa38612aa7b246a