Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f90e38c7cb98577…

MALICIOUS

PDF

86.7 KB Created: 2021-03-25 02:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 789771a6de9fd83113223902c3c44365 SHA-1: 519d997704f40c6426887e9c57fddba2b802e2ff SHA-256: 1f90e38c7cb985771942603b640d46574be0ca76e631a9748d4f32b9ebb53d85
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The document contains a link farm with numerous external URLs, suggesting it's designed to redirect users to potentially harmful websites. The primary URL, https://kuzutuzo.ru/wix?keyword=violet+y+finch+pdf+espa%25C3%25B1ol+gratis, appears to be a lure for search engine optimization, aiming to attract users searching for specific content and redirect them to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=violet+y+finch+pdf+espa%25C3%25B1ol+gratis PDF link annotation
    • http://zeweduzu.iblogger.org/cahors_tourist_information_office.pdfIn PDF document text
    • http://tewajaz.iblogger.org/schumacher_battery_charger_se-4020_price.pdfIn PDF document text
    • https://newovedisi.weebly.com/uploads/1/3/5/3/135348170/6653344.pdfIn PDF document text
    • https://kususeni.weebly.com/uploads/1/3/2/7/132740764/6367681.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/9648296770.pdfIn PDF document text
    • https://bowodazuludov.weebly.com/uploads/1/3/4/7/134700376/moxuvoduwerowamasan.pdfIn PDF document text
    • https://wijuluberaselak.weebly.com/uploads/1/3/4/0/134016921/b44bb758.pdfIn PDF document text
    • https://vibikawezawu.weebly.com/uploads/1/3/4/7/134734059/c050194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_0dd07ce5b4a747fb92e3dc0850bd4179.pdf?index=trueIn PDF document text
    • http://vizomonuzujo.onlinewebshop.net/15802518139.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/why_is_my_miele_washing_machine_not_spinning_properly.pdfIn PDF document text
    • http://favigawesuwevo.rf.gd/davakupapemetak.pdfIn PDF document text
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_d9c1346e7e034ebe921d32bed5582054.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_2bdb94583def472e884d24da890b0db6.pdf?index=trueIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_bce655eccaf1480d9b0404d56ccc735f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedesowul/avg_cleaner_pro_apk_revdl.pdfIn PDF document text
    • http://wabeworozad.rf.gd/curriculum_guide_grade_1_araling_panlipunan.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/what_is_the_next_big_video_game_release.pdfIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_ff1f908750e543cb92bf5dbc29535cea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/72399928579.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/wapaxesisamejapemokif.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/jiguluziroramuwadawul.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off000110c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 5696 bytes
SHA-256: a6eb97d0f0f1d8b415d03ccf0273f3e340d642d72f254dcbbe041312c793ea6a
font_02_sfnt_off000123f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F3 11748 bytes
SHA-256: 9d61fc16d878cecc6b97323c2bad4c85dffc5dcee42a2a923136044fd5b83255

Open this report in the interactive analyzer, or submit your own file for analysis.