Malicious PDF — malware analysis report

Static analysis result for SHA-256 579e74e4f83dbd56…

MALICIOUS

PDF

81.4 KB Created: 2021-10-15 03:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d97c5ac443160a57207f61b6e8113a39 SHA-1: 4346288e65b380d1d94bda8c4d8be3b28d90fcb1 SHA-256: 579e74e4f83dbd565e4faeb58c00def351992f3f00926a14a5817a21fb257e1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://oniceh.ru/uplcv?utm_term=tab+delimited+excel PDF link annotation
    • https://boumqueur-edition.com/upload/fckeditor/file/5329063841.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/3985dc7eb3a51f642ef853e4b0bb1720/64390890968.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/66830388410.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615736f47a0ee---32634454016.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/pebusuvugizapig.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/57449000038.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/77818322262.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/ranuloporega.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/4051686346.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/75902566335.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/begemus.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/vujelopuroxadox.pdfIn PDF document text
    • http://kk-gorenjska.si/uporabnik/file/zulasobijitifesuvulexet.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/30955482063.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8677b49094b0039563795903e78da5e5/kuxutagonozodamezimevepu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/coee2jfls22e53d19aclthjj02/77514868132.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/wedir.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/918d5ea97b589f735c3d2d4802e59f2f/tebojigawurufusara.pdfIn PDF document text
    • http://timebymtm.com/upload/files/loserikojev.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/33688212946.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16168bc9588365---xijuxutejomugafamadivogam.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/mutinote.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/fuvesubefadojuwopawemoj.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/99070866269.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/3s07oq55jvbbjamqa5ie7kuqk2/xiwunifutomukapot.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202110032046045443.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_off0000da81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA81 17876 bytes
SHA-256: 011d62630c88e30498d8735a3a8a27d5c46eedbac9c96a7d883d2bcd6febf669
font_01_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001213e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213E 10244 bytes
SHA-256: d582fd2d213c7f5d831587c51e4b3eff59480029c8adbeed9996489947800f58

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