Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87195890a2e9203…

MALICIOUS

PDF

85.6 KB Created: 2021-03-16 23:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 998b1f73e98dd002b41735154f98de27 SHA-1: eb9931d6e5248d889416befddc23a642c3a0ed4d SHA-256: d87195890a2e920392b8bef181a6d5714a43959063b1dc9da9b106f8ced1041d
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to "aalapana telugu audio songs free", likely to entice clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://soxebez.ru/123?utm_term=aalapana+telugu+audio+songs+free PDF link annotation
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/0b7068b7c6.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/3550ddf9.pdfIn PDF document text
    • http://flowerport.store/xikeragolexinawonedobezujpiyk.pdfIn PDF document text
    • http://zumbayuliya.online/algebra_lineal_howard_anton_5ta_edicion_descargar_gratisxc3z5.pdfIn PDF document text
    • http://ligoturup.22web.org/10140079527.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/xifoniruguvexano.pdfIn PDF document text
    • https://suzagadagaxu.weebly.com/uploads/1/3/0/7/130775939/9120349.pdfIn PDF document text
    • http://laitlabs.pro/acting_in_film_michael_caine_masterclass1a6hc.pdfIn PDF document text
    • http://pixxel.life/8956351157982iuq.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/gizuse.pdfIn PDF document text
    • http://liketime.online/kota_the_friend_foto_full_albumn14d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06039a2c-be7f-4417-ab81-6fe5ca51b80c/is_k_solid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85aa998d-dd2b-4844-80df-c2b36a056cae/donjon_weather_generator.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_876b365af11e4b0c870bd38df6b3177f.pdf?index=trueIn PDF document text
    • http://penabak.epizy.com/numero_de_telefono_de_la_universidad_del_tolima_en_bogota.pdfIn PDF document text
    • http://sidovarodefomi.rf.gd/48209421031.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_1c80746b8a6e4b67bea7f7dd8fca289d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28b5ee9-63aa-45b3-b813-62bca56e72e7/bipadexopuzilezexezo.pdfIn PDF document text
    • http://tujefuguxofela.rf.gd/bolamanazixuzumorugoga.pdfIn PDF document text
    • http://zegupevisosid.epizy.com/ielts_recent_actual_test_reading.pdfIn PDF document text
    • http://sabenofesas.rf.gd/czardas_piano_accompaniment_sheet_music_free.pdfIn PDF document text
    • http://zuluvegutadetu.epizy.com/3d_paper_cutting_templates.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_8334c6c223ef4513bd84b965983ffb1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9593a55d-f7bd-4e36-84f0-1f7102107bb4/mozegamoxobelizijematemiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd78633-6f7c-4745-8305-c62cce6afdc8/libro_porque_le_pasan_cosas_malas_a_la_gente_buena_gratis.pdfIn PDF document text
    • http://mafofeguf.epizy.com/why_is_my_samsung_watch_screen_black.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_b0c8c8afb6f54cc587f6984525980487.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 5200 bytes
SHA-256: 13897a086150be107518bd925e51b115affcd568fc510da3f8a8dfc77407f2bc
font_01_sfnt_off000120ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AE 11272 bytes
SHA-256: 0f1d0d679de048d960acab1ecd626ffa101e7122cf9e11ce22636816aaf40b1c