Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad5636b4c0c0bed…

MALICIOUS

PDF

64.0 KB Created: 2021-04-04 08:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 06dad781a083e040b998699799537cc3 SHA-1: 581326599f6380cd71830fef3a0391b5671da43a SHA-256: 3ad5636b4c0c0bed42185ebc7e191875165f8c5e0da875f8c69dde0385983e2b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/award?keyword=full+quran+with+bangla+translation+pdf+download PDF link annotation
    • https://cdn.sqhk.co/nanagajog/fz5hajj/stickman_shooter_stickman_games_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/WYQSUaB/majoxederuvowubizajegi.pdfIn PDF document text
    • http://kumajamefe.getenjoyment.net/35295743327.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/nolewogizuzi.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/advanced_dungeons__dragons_players_handbook.pdfIn PDF document text
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/biruweziw_sovuwejabutaf_wimolivovej_niniwugo.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/9ifjgja/23238607852.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/jhnhcBz/47423073562.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/xedagumezugonewira.pdfIn PDF document text
    • http://jiwobexibigubot.22web.org/timisanosa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/kudores.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb14021-f90a-42c4-aa37-21753b9717d3/jadefemodutowen.pdfIn PDF document text
    • http://vuvinumebipoje.rf.gd/42092438793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1322e188-d420-4854-8580-63a686524029/how_to_read_notes_violin_beginners.pdfIn PDF document text
    • http://gunitolowed.rf.gd/84684144019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921ddbc4-b2e7-42e9-87ab-7821912d0e59/38290834122.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/chaos_space_marines_codex_9th_edition.pdfIn PDF document text
    • http://zawuzujuw.epizy.com/bidexekexanaxarigovat.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/acts_of_service_love_language_ideas_for_boyfriend.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/slope-_intercept_form_math_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/muvot.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD16 5616 bytes
SHA-256: ee20592650303aad243c71ce8201d23041f59b3bf519a098ce5fb3af1a968c22
font_01_sfnt_off0000d030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD030 9196 bytes
SHA-256: bcae903c0f25f6a4052dd430cc6b63ec59c4ecba3db5fc4f310821faeda58032

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